OOF™ Origin Open Foundation™

Independent Methodological Authority

Architecture Ecosystem: Structured Reality Standards™
Architecture Family: TREGA™ — Tax-Relevant Event Governance Architecture™
Parent Standard: TRECLS — Tax-Relevant Event Lifecycle & Continuity Standard
Module: EADM — Event Amendment Module
Operational Layer: Event Amendment Governance Layer
Category: Governance & Enforcement
Subcategory: Tax-Relevant Event Governance
Type: Core Module
Governed Space: Event Amendment
Primary Governed Object: Governed Event Amendment State
Origin ID: TREGA-TRECLS-EADM-002
Version: 1.0
Status: Canonical · Open Standard
Effective Date: 3 September 2026
AI-Readable: Yes
Authority: OOF®
Protection: MIP® — Methodological Intellectual Property
Canonical Language: UCL — Universal Canonical Language

Canonical Definition

The Event Amendment Module (EADM) governs how a continuing
Tax-Relevant Event may receive materially relevant additions,
refinements, or modifications without treating every legitimate
lifecycle update as a Correction or New Event Formation.

Its principal transition is:

Governed Event Continuity State

↓

Event Amendment Governance

↓

Governed Event Amendment State

EADM governs amendments that update the governed Event while
preserving legitimate Event Continuity.

Its foundational distinction is:

Amendment ≠ Correction.

And:

Amendment ≠ New Event by default.

Operational Role

After ECOM establishes that the same Event may legitimately
continue, new information may need to be incorporated into the
governed Event state.

That information may not correct an error.

It may simply add, refine, or extend what is known.

EADM answers:

How can new materially relevant information be incorporated into
the continuing Event without erasing prior state, misclassifying
the change as a correction, or creating a new Event
unnecessarily?

EADM prevents: silent Event modification; uncontrolled data
enrichment; loss of prior Event state; amendment/correction
confusion; over-expansion of Event scope; amendment without
continuity basis; amendment without materiality assessment; and
amendment that improperly overrides upstream governance.

Internal Module Flow

TRECLS operates through:

ECOM — Event Continuity

↓

EADM — Event Amendment

↓

ECRTM — Event
Correction

↓

ESPM — Event Supersession

↓

ECLM — Event Closure

↓

Jurisdiction-Ready Tax-Relevant Event

EADM receives:

Governed Event Continuity State

and produces:

Governed Event Amendment State

for subsequent lifecycle governance.

Operational Transition

The canonical transition is:

Governed Event Continuity State

↓

Amendment Trigger

↓

Amendment
Scope

↓

Amendment Assessment

↓

Amendment Integration

↓

Governed
Event Amendment State Operational Space

EADM governs: Amendment Trigger identification; Amendment
eligibility; Amendment scope; Amendment materiality; amendment
content; prior-state preservation; current-state update;
amendment qualification; Event component refinement;
supporting-information addition; Event Context amendment;
Participation amendment; Timing amendment reference; Location
amendment reference; Value Association amendment reference;
Relationship amendment reference; Determination-impact reference;
amendment conflict; amendment ambiguity; amendment withdrawal;
amendment replacement; amendment continuity; and amendment
handoff.

Operational Scope

EADM may govern amendments within: physical transactions; digital
services; commercial transactions; financial activity; platform
Events; AI-agent Events; machine-to-machine Events; autonomous
systems; distributed environments; digital assets; smart
contracts; industrial systems; cross-border activity; multi-party
Events; long-running Events; and future machine economies.

The module remains technology-neutral and jurisdiction-neutral.

Amendment Object

The Amendment Object is the materially relevant new or refined
information proposed for incorporation into an existing
continuing Event.

The Amendment Object may modify the governed Event state without
asserting that the prior state was wrong.

New Information ≠ Prior Error by default.

Amendment Trigger

An Amendment Trigger may arise from: newly available information;
newly identified participant involvement; additional supporting
records; refined Event Context; new Location information;
expanded Timing information; updated Value Association; new
relationship information; later operational development; improved
machine-generated information; new cross-system representation;
or previously unavailable governed reference.

Not every new data point requires formal amendment.

Amendment Eligibility

An amendment is eligible where: Event Continuity remains valid or
sufficiently qualified; the new information belongs to the same
governed Event; the change is not primarily the correction of
known error; the amendment does not illegitimately redefine Event
Formation or Boundary; and the information is materially relevant
to Event governance or downstream reliance.

Available Information ≠ Eligible Amendment by default.

Amendment vs Correction

The principal distinction is:

Amendment adds or refines legitimate Event information.

Correction replaces or rectifies information that was materially
wrong or improperly represented.

For example:

A newly identified supporting participant may require Amendment.

A participant that was incorrectly identified may require
Correction.

Additional Information ≠ Correction by default.

Amendment vs New Event

An amendment remains within the same Event only while Continuity
remains legitimate.

Where the proposed change materially alters Event Formation,
Event Boundary, or the underlying occurrence, the change may no
longer qualify as an Amendment.

It may require upstream reassessment or New Event Formation.

Amendment Scope

EADM shall define which governed part of the Event is being
amended.

Possible scopes include: Context; Timing; Location;
Participation; Value Association; Event Relationships; supporting
references; Determination-related qualification; lifecycle
metadata.

Scope should remain explicit.

Amending One Event Component ≠ Reopening the Entire Event by
default.

Amendment Materiality

Amendments should be governed according to materiality.

A material amendment may affect: interpretation of Event state;
downstream tax evaluation; Continuity; Determination; Event
Relationships; Value Association; traceability; jurisdiction
readiness.

A non-material amendment may only improve metadata or operational
clarity.

Non-Material Amendment

Examples may include: additional internal reference; technical
documentation enrichment; supplementary supporting information;
non-substantive descriptive clarification.

Such amendments should not create unnecessary lifecycle
complexity.

Material Amendment

A Material Amendment changes information sufficiently to affect
governed understanding or downstream reliance while still
preserving legitimate Event Continuity.

Material amendments should remain traceable and clearly
distinguishable from prior Event state.

Prior-State Preservation

Every materially relevant Amendment shall preserve access to the
prior governed Event state.

The canonical pattern is:

Prior Event State

↓

Amendment

↓

Amended Event State

not:

Prior Event State

↓

Silent Replacement Current Effective State

Once validly integrated, the amended state may become the current
effective Event state.

The prior state remains historically reconstructable.

Current Amended State ≠ Only Event State That Ever Existed.

Amendment Addition

An amendment may add information that was previously unknown.

Examples include: additional Event participant; newly identified
operational Location; additional Event relationship;
supplementary Value reference; new supporting Record.

Addition does not automatically imply the earlier Event state was
defective.

Amendment Refinement

An amendment may improve precision.

Examples include: more precise Location; better Timing
granularity; richer Participant Role information; refined
Context; more specific Value reference.

Refinement may preserve both Event identity and earlier
historical state.

Amendment Extension

An amendment may extend governed information where the Event is
still active or continuing.

This is common in long-running digital or machine Events.

Extension must not be used to absorb a substantively separate
occurrence.

Extension ≠ Unlimited Event Expansion.

Event Context Amendment

TRECS owns Event Context.

EADM may incorporate an amended Context result where new context
becomes legitimately relevant during Event lifecycle.

EADM does not redefine Context independently.

Timing Amendment

Additional Timing information may become available.

Where the prior Timing was not wrong but incomplete, Amendment
may be appropriate.

If the prior Timing was materially incorrect, ECRTM may instead
be required.

TRETS remains authoritative.

Location Amendment

A new operational Location may legitimately be added without
correcting an earlier Location.

For example, a distributed Event may later involve another valid
operational node.

Additional Location ≠ Location Correction by default.

TRELS remains authoritative over Location.

Participation Amendment

A continuing Event may acquire additional participants or
participant roles.

EADM may govern the lifecycle incorporation of those results
after TREPS governance.

New Participant ≠ New Event by default.

Where participant change materially alters Event Formation, ECOM
continuity reassessment may be required.

Value Association Amendment

An additional governed Value Association may be incorporated
where the Event remains the same Event.

TRVAS owns the Value Association result.

VFM® owns the Value lifecycle itself.

Event Relationship Amendment

A new Event Relationship may become known after the initial Event
Record was established.

TRERLS governs the relationship.

EADM governs the lifecycle incorporation of the resulting
relationship information.

Supporting Reference Amendment

New supporting records may be added to the Event without
redefining the Event.

Examples include: later invoice; additional settlement record;
supporting technical log; contract reference; machine-state
record.

New Supporting Record ≠ New Event.

Determination Impact

An Amendment may affect the basis on which TREDS previously
determined the Event as tax-relevant.

Where material, EADM should trigger or reference TREDS
reconsideration.

EADM does not independently modify Determination.

Amendment Impact ≠ Determination Authority.

Amendment Qualification

An Amendment may be incorporated with qualification where:
supporting information remains incomplete; the amendment scope
remains bounded; downstream reliance should be limited; one
upstream governance result remains unresolved.

Qualification shall remain visible.

Amendment Ambiguity

Amendment Ambiguity exists where it is unclear: whether new
information belongs to the same Event; whether it is amendment or
correction; whether the change is material; whether upstream
reassessment is required.

The amendment shall remain unresolved until sufficient governance
exists.

Amendment Conflict

Conflict exists where materially authoritative governance
information supports incompatible amendment outcomes.

Examples include: one source supports adding a Participant;
another establishes that the actor did not participate; one
system extends Event Timing; another authoritative result
establishes Event completion earlier.

Conflict shall remain explicit.

Amendment Rejection

A proposed Amendment may be rejected where: the information does
not belong to the Event; continuity is invalid; the amendment
attempts to overwrite a Correction; it would materially redefine
Event Formation or Boundary; governance basis is insufficient; or
the amendment would import downstream tax conclusions into
canonical Event governance.

Amendment Withdrawal

A proposed Amendment may be withdrawn before becoming effective.

Withdrawal should preserve relevant governance history where
material.

Withdrawn Amendment ≠ Never-Proposed Amendment.

Amendment Replacement

A proposed Amendment may be replaced by a more complete or
authoritative Amendment before final integration.

Replacement should not silently erase earlier materially relevant
lifecycle state.

Amendment Sequence

An Event may undergo multiple amendments:

Original State

↓

Amendment A

↓

Amendment B

↓

Amendment C

Each materially relevant Amendment should remain reconstructable.

Multiple amendments do not automatically create multiple Events.

Amendment Continuity

Where an Amendment materially changes the Event enough to call
Continuity into question, EADM shall return the case to ECOM.

Valid Prior Continuity ≠ Permanent Continuity Guarantee.

Cross-System Amendment

An amendment may originate in a different system from the one
holding the canonical Event Record.

The amendment should be associated with the same governed Event
identity.

Different systems do not create different amendment realities by
default.

Cross-Organization Amendment

Different organizations may contribute legitimate Event updates.

EADM shall preserve the distinction between: amendment source;
amendment authority; canonical Event state.

External Contribution ≠ Automatic Canonical Amendment.

Cross-Border Amendment

New cross-border information may amend the Event.

For example: new operational Location; new Participant; new Value
Association; new Event Relationship.

The amendment itself remains jurisdiction-neutral.

Cross-Border Amendment ≠ Tax Jurisdiction Determination.

Machine-Generated Amendment

Autonomous systems may propose amendments automatically.

Examples include: additional machine participant; refined
sensor-derived Timing; new supporting transaction reference;
newly correlated Value information.

Automated generation does not eliminate governance requirements.

Machine-Generated Update ≠ Governed Amendment by default.

Amendment Frequency

High-frequency systems may generate many candidate amendments.

Formal lifecycle governance should apply only where changes are
materially relevant.

More Updates ≠ More Amendments by default.

Amendment and Historical Reconstruction

Amendments should preserve sufficient information to reconstruct:
prior Event state; amendment trigger; amendment scope; amendment
basis; amended state; current effective state.

ERTM remains authoritative for Record Traceability.

Amendment and Record Governance

TREGS owns Record identity, structure, linkage, traceability, and
interoperability.

EADM governs the Event lifecycle effect of amendment.

The Event Record may then need to be updated through
TREGS-compatible mechanisms.

Event Amendment ≠ Record Mutation by default.

Amendment and Tax Law

A jurisdiction may react to an Amendment by: reassessing tax;
requiring new filing; changing Tax Base; changing legal
treatment.

Those are downstream outcomes.

Event Amendment ≠ Tax Reassessment Decision.

Governance States

EADM may represent:

Amendment Governance Not Initiated

Amendment Trigger Identified

Amendment Candidate Identified

Amendment Eligibility Under Review

Amendment Eligible

Amendment Scope Defined

Amendment Non-Material

Amendment Material

Amendment Under Review

Amendment Qualified

Amendment Ambiguous

Amendment Conflicted

Upstream Review Required

Continuity Reassessment Required

Amendment Rejected

Amendment Withdrawn

Amendment Integrated

Governed Event Amendment State Established

Ready for Correction Governance Governance
Requirements

EADM implementations shall ensure that: a valid Governed Event
Continuity State exists; the proposed change belongs to the
continuing Event; Amendment remains distinct from Correction;
Amendment remains distinct from New Event Formation; amendment
scope is explicit where material; amendment materiality is
assessed; materially relevant prior Event state remains
reconstructable; current amended state remains distinguishable
from prior state; additional information is not automatically
treated as prior error; amendment does not independently redefine
upstream TREGA™ results; Context, Timing, Location,
Participation, Value Association, and Relationship amendments use
authoritative upstream governance where required; Determination
impact is referred to TREDS where material; qualified amendments
remain explicit; ambiguity and conflict remain visible; rejected
or withdrawn material amendments remain reconstructable where
necessary; amendments do not silently absorb substantively
separate occurrences; continuity is reassessed where amendment
materiality challenges same-Event identity; machine-generated
changes are not automatically accepted; high-frequency update
volume does not determine amendment count; downstream tax
conclusions remain outside amendment governance; and the
resulting Event state is suitable for subsequent TRECLS lifecycle
governance.

Governance Logic

IF no valid Governed Event Continuity State exists, THEN EADM
shall not establish a canonical Event Amendment.

IF new information does not belong to the same governed Event,
THEN it shall not be integrated as an Amendment.

IF the change primarily rectifies materially incorrect
information, THEN the change shall be referred to ECRTM rather
than treated as Amendment.

IF the change adds or refines materially relevant information
while Event Continuity remains valid, THEN Amendment Governance
may proceed.

IF amendment scope materially changes Event Formation or
Boundary, THEN continuity shall be reassessed before integration.

IF a material Amendment affects Event Determination, THEN TREDS
reconsideration shall be triggered or referenced.

IF Amendment information is materially ambiguous or conflicted,
THEN it shall remain qualified or unresolved rather than silently
integrated.

IF the proposed Amendment contains downstream legal tax
conclusions, THEN those conclusions shall remain outside
canonical Event Amendment.

IF a proposed Amendment is withdrawn or rejected, THEN it shall
not become the current effective Event state.

IF the Amendment is validly governed and integrated, THEN the
amended Event state may become the current effective state while
the prior state remains historically reconstructable.

Minimum Implementation Framework

A minimum EADM implementation should support:

Amendment Governance ID A stable identifier for the EADM
governance process.

Canonical Event Reference The Event being amended.

Governed Event Continuity State Reference The applicable ECOM
output.

Prior Event State Reference The state existing before Amendment.

Amendment Trigger Type New Information, Additional Participant,
Context Refinement, Timing Extension, Location Addition, Value
Association Addition, Relationship Addition, Supporting Reference
Addition, or other governed trigger.

Amendment Candidate Reference The proposed amendment information.

Amendment Scope The Event component or governance area affected.

Amendment Type Addition, Refinement, Extension, Supporting
Reference, Qualification Update, or other governed type.

Amendment Materiality State Non-Material, Material, Critical,
Unresolved.

Amendment Eligibility State Eligible, Qualified, Ineligible,
Unresolved.

Amendment Basis Reference The governance or information basis for
the Amendment.

Context Amendment Reference Any TRECS-related amendment.

Timing Amendment Reference Any TRETS-related amendment.

Location Amendment Reference Any TRELS-related amendment.

Participation Amendment Reference Any TREPS-related amendment.

Value Association Amendment Reference Any TRVAS-related
amendment.

Relationship Amendment Reference Any TRERLS-related amendment.

Determination Impact State None, Potential, Material,
Reconsideration Required.

Determination Reconsideration Reference Any TREDS reconsideration
reference.

Amendment Qualification Any limitations attached to the
Amendment.

Amendment Ambiguity State Whether amendment meaning or
eligibility remains uncertain.

Amendment Conflict State Whether materially incompatible
amendment conclusions exist.

Continuity Reassessment State Whether ECOM reassessment is
required.

Amendment Withdrawal State Whether the proposed Amendment was
withdrawn.

Amendment Replacement Reference Any superseding Amendment
candidate.

Current Effective Event State Reference The Event state after
valid Amendment integration.

Historical Amendment Reference Prior materially relevant
Amendment state.

Governance State The current EADM governance state.

Amendment Outcome Integrated, Qualified, Rejected, Withdrawn, or
Unresolved.

Handoff State Whether the Event is ready for subsequent TRECLS
lifecycle governance.

Governance Outputs

EADM may produce: Amendment Trigger State; Amendment Candidate;
Amendment Eligibility State; Amendment Scope; Amendment Type;
Amendment Materiality State; Amendment Basis Reference; Amendment
Qualification; Amendment Ambiguity State; Amendment Conflict
State; Context Amendment Reference; Timing Amendment Reference;
Location Amendment Reference; Participation Amendment Reference;
Value Association Amendment Reference; Relationship Amendment
Reference; Determination Impact State; Continuity Reassessment
State; Amendment Withdrawal State; Amendment Replacement
Reference; Current Effective Event State; and the principal
output: Governed Event Amendment State.

Critical Distinctions

Amendment ≠ Correction.

Amendment ≠ New Event by default.

New Information ≠ Prior Error by default.

Available Information ≠ Eligible Amendment by default.

Additional Information ≠ Correction by default.

Amending One Event Component ≠ Reopening the Entire Event by
default.

Current Amended State ≠ Only Event State That Ever Existed.

Extension ≠ Unlimited Event Expansion.

Additional Location ≠ Location Correction by default.

New Participant ≠ New Event by default.

New Supporting Record ≠ New Event.

Amendment Impact ≠ Determination Authority.

Withdrawn Amendment ≠ Never-Proposed Amendment.

Valid Prior Continuity ≠ Permanent Continuity Guarantee.

External Contribution ≠ Automatic Canonical Amendment.

Cross-Border Amendment ≠ Tax Jurisdiction Determination.

Machine-Generated Update ≠ Governed Amendment by default.

More Updates ≠ More Amendments by default.

Event Amendment ≠ Record Mutation by default.

Event Amendment ≠ Tax Reassessment Decision.

Enterprise Application

EADM provides the controlled update layer that allows a governed
Event to absorb legitimate new information without destabilizing
Event identity.

The operational pattern is:

Governed Event Continuity State

→ New Information

→ Amendment Eligibility

→ Amendment Scope & Materiality

→ Amendment Integration

→ Governed Event Amendment State

Where the proposed change is actually an error correction:

Amendment Candidate

↓

ECRTM — Event Correction Governance

Where the proposed change threatens continuity:

Amendment Candidate

↓

ECOM — Continuity Reassessment

This prevents ordinary lifecycle updates from becoming either
uncontrolled Record edits or unnecessary New Event Formation. Use
Case 1 — New Participant Added to a Continuing Digital Service
Event

A cross-border digital service Event has already been governed
and remains active.

After the original Record was created, another platform is
identified as having materially participated in execution.

The original Event was not wrong when first governed; the
additional participation information simply was not previously
available.

TREPS establishes the new Participation result.

EADM governs its lifecycle incorporation:

Existing Event State

↓

New Participation Information

↓

Amendment
Eligible

↓

Amended Event State

The Event remains continuous.

The prior Event state remains historically reconstructable.

No Correction or New Event Formation is required solely because
another legitimate participant became known. Use Case 2 —
Autonomous Event Receives Additional Value Association

An autonomous machine Event has already been governed.

Later, a newly completed operational stage creates an additional
Value Association that belongs to the same continuing Event.

TRVAS governs the Value Association.

ECOM confirms Event Continuity.

EADM integrates the additional Value Association into the current
Event state.

The lifecycle becomes:

Prior Event State

↓

Additional Governed Value Association

↓

Material Amendment

↓

Amended Current Event State

If the new Value relationship had instead represented a
substantively separate occurrence, ECOM would require continuity
reassessment rather than allowing EADM to expand the original
Event indefinitely.

Canonical Boundary

EADM owns the governance of Event Amendment eligibility,
Amendment Triggers, Amendment scope, Amendment type, Amendment
materiality, incorporation of legitimate new or refined
information, prior-state preservation, current amended state,
amendment qualification, ambiguity, conflict, withdrawal,
replacement, continuity reassessment triggers, and establishment
of the Governed Event Amendment State.

EADM does not determine whether the Event remains continuous;
ECOM owns Event Continuity.

It does not govern correction of materially wrong information;
ECRTM owns Event Correction.

It does not govern Event Supersession or Closure.

It does not independently redefine Event Context, Formation,
Boundary, Timing, Location, Participation, Value Association,
Event Relationships, or Event Determination.

It does not determine legal Taxability, Tax Jurisdiction,
taxpayer status, Tax Base, Tax Rate, legal tax point, Tax Period,
Tax Liability, reassessment obligations, filing requirements, or
other jurisdiction-specific tax consequences.

Its governance begins with a valid:

Governed Event Continuity State

and a proposed or required Event Amendment.

Its governance ends with:

Governed Event Amendment State

or with referral to:

ECOM for Continuity Reassessment

or:

ECRTM where Correction Governance is required.

Canonical Handoff

ECOM — Governed Event Continuity State

↓

EADM — Governed Event
Amendment State

↓

ECRTM — Event Correction Governance

Where continuity becomes materially uncertain:

EADM

↓

ECOM — Continuity Reassessment

Canonical Closing Statement

EADM allows a governed Event to learn more about itself without
pretending that every new fact corrects an error or creates a new
Event.

Amendment preserves legitimate Event evolution while keeping
prior state, continuity, and upstream governance boundaries
intact.

Amendment ≠ Correction.

Amendment ≠ New Event by default.

New Information ≠ Prior Error.