About Tax-Relevant Event Participation
Standard (TREPS)

Tax-Relevant Event Participation Standard?

The Tax-Relevant Event Participation Standard (TREPS) is the
seventh Parent Standard within TREGA™ — Tax-Relevant Event
Governance Architecture™.

TREPS governs how materially relevant human, organizational,
digital, machine, autonomous, and other actors are represented as
participants in a governed Tax-Relevant Event.

Its purpose is to establish a reliable governance layer between
the existence of actors around an event and the later legal or
tax interpretation of their involvement.

TREPS answers the fundamental operational question:

Who or what materially participated in the governed event, and
how is that participation represented without prematurely
determining its legal or tax meaning?

TREPS receives a Governed Temporally and Spatially Situated Event
from TRELS and develops it into a: Governed Participatory Event

This means the event is no longer governed only in terms of what
occurred, its boundary, when it occurred, and where it occurred.

It now also contains a governed representation of who or what
materially participated in it. ------------------------------ Why
TREPS Exists

Traditional transaction and tax systems were largely designed
around relatively simple participation structures.

A transaction might contain:

Seller

↓

Buyer

or:

Employer

↓

Employee

or:

Service Provider

↓

Customer

Modern operational reality is increasingly more complex.

A single event may involve: a customer; a merchant; a digital
marketplace; a payment provider; a logistics provider; a cloud
service; an AI agent; an autonomous machine; a software platform;
an intermediary; and several supporting systems.

Some actors may materially participate in the event.

Others may merely provide infrastructure, information,
connectivity, ownership, administration, or technical support.

The existence of an actor in the technical record therefore does
not automatically mean that the actor participated in the
governed event.

TREPS exists to govern this distinction.

Actor Association ≠ Event Participation by Default.

Without a governed participation layer, downstream systems may
begin legal or tax analysis using an incomplete, incorrectly
attributed, or oversimplified representation of who or what
actually participated.

TREPS establishes that operational participation first.
------------------------------ What TREPS Governs

TREPS governs the architecture-level space of Tax-Relevant Event
Participation.

It establishes governance requirements for representing:
materially relevant participants; participant differentiation;
operational participation roles; actor-event associations;
multiple participants within one event; human participation;
organizational participation; digital participation; machine
participation; autonomous participation; participation changes;
participation continuity; participation uncertainty;
participation conflict; and participation traceability.

The objective is not merely to create a participant list.

The objective is to establish a governed representation of the
relationship between actors and the event.
------------------------------ Participation Versus Participant
Identification

TREPS makes an important distinction between identifying an actor
and establishing participation.

Participant Identification establishes which actor is under
participation governance.

Event Participation establishes whether and how that actor
materially participates in the governed event.

An actor may be perfectly identifiable without being a
participant in the event.

A cloud provider may be identifiable.

A machine owner may be identifiable.

A corporate parent may be identifiable.

A payment infrastructure provider may be identifiable.

A software developer may be identifiable.

Their existence or technical association does not automatically
establish participation in the particular governed event.

Therefore:

Identified Actor ≠ Governed Event
Participant

Participant Identification ≠ Event
Participation

This distinction prevents identity records, ownership structures,
technical connections, or database references from being mistaken
for operational participation. ------------------------------
What TREPS Does Not Govern

TREPS does not determine the legal or tax status of a
participant.

In particular, TREPS does not determine: taxpayer status;
taxable-person status; tax residence; Tax Jurisdiction; tax
nexus; permanent establishment; significant economic presence;
place of supply; source jurisdiction; beneficial ownership; legal
liability; contractual liability; tax liability; responsibility;
accountability; filing obligation; reporting obligation;
withholding obligation; tax base; tax rate; exemption; deduction;
collection; payment; or enforcement.

The foundational boundary is: Participant
≠ Taxpayer

A participant may subsequently become legally relevant under the
rules of one or more jurisdictions.

That determination occurs after TREGA™ has established the
governed event. ------------------------------ Participation Is
Not Identity Governance

TREPS also does not recreate the complete identity of an actor.

Where governed identity, origin, ownership, authority,
permission, or provenance is required, those governance spaces
belong to OBIDENITY®.

TREPS may consume an appropriate governed actor reference.

It then determines how that actor relates operationally to the
event.

Therefore:

Actor Identity ≠ Event Participation

Participation ≠ Identity Governance

This separation allows TREPS to govern participation without
duplicating identity infrastructure.
------------------------------ Participation Is Not
Responsibility or Liability

Being involved in an event does not automatically make an actor
responsible for the event or liable for its consequences.

Therefore:

Participant ≠ Responsible Party by Default

Participation ≠ Accountability

Participation ≠ Liability

Accountability belongs to the relevant accountability governance
architecture.

The lifecycle of harm and liability belongs to HALIA™ where
applicable.

TREPS establishes participation as operational reality before
those separate governance questions are addressed.
------------------------------ Human, Machine, and Autonomous
Participation

TREPS is designed for both traditional and emerging economic
environments.

A governed participant may be: a human; an organization; a
digital platform; a software system; an AI agent; an autonomous
system; a robot; a machine; or another governable operational
actor.

This becomes increasingly important as economic activity moves
toward autonomous execution.

A machine may order a component.

An AI agent may select a provider.

An autonomous system may initiate a transaction.

Two machines may exchange economically relevant services or
resources.

TREPS does not require a human actor to be artificially inserted
into the operational event merely because legal systems may later
need to attribute legal responsibility to a human or
organization.

Machine Participant ≠ Machine Owner.

Autonomous Participant ≠ Human Operator by Default.

Operational participation is governed first.

Legal attribution occurs later. ------------------------------
Multi-Participant Events

TREPS supports events containing multiple legitimate
participants.

The canonical structure may therefore be:

One Governed Event

↓

Multiple Governed Participants

↓

Distinct Operational Participation Roles

The existence of several participants does not automatically mean
that several events exist.

Multiple Participants ≠ Multiple Events by Default.

Likewise, participants do not need to possess identical roles or
identical downstream legal significance.

TREPS preserves the operational participation structure so that
later systems can evaluate it without reconstructing the
underlying event. ------------------------------ Participation
Across Time and Space

Participants may enter, leave, change roles, operate remotely,
act sequentially, or participate simultaneously.

Their physical location may also differ from the Event Location.

Therefore:

Presence at Event Location ≠ Event Participation by Default.

Participant Location ≠ Event Location by Default.

Participation Change ≠ New Event by Default.

TREPS preserves participation as part of the governed event while
TRETS remains authoritative for Event Timing and TRELS remains
authoritative for Event Location. ------------------------------
Position in the TREGA™ Governance Flow

TREPS occupies the seventh position in the complete TREGA™
governance lifecycle:

Real-World / Digital Event

→ 1. TRECS — Event Context

→ 2. TRERS — Event Recognition

→ 3. TREFS — Event Formation & Root Association

→ 4. TREBS — Event Boundary

→ 5. TRETS — Event Timing

→ 6. TRELS — Event Location

→ 7. [TREPS — Event Participation]

→ 8. TRVAS — Value Association

→ 9. TRERLS — Event Relationships

→ 10. TREDS — Event Determination

→ 11. TREGS — Governed Tax-Relevant Event Record

→ 12. TRECLS — Event Continuity & Lifecycle

→ Jurisdiction-Ready Tax-Relevant Event

→ Jurisdictional Tax Rules / Tax Engine

→ Tax Determination

→ Reporting / Compliance

Its immediate governance position is:

Event Location

↓

Event Participation

↓

Value Association

TRELS establishes:

Where did the event occur?

TREPS establishes:

Who or what materially participated?

TRVAS subsequently establishes:

Which governed value result belongs to the event?
------------------------------ How TREPS Works Within TREGA™

TREPS receives: Governed Temporally and
Spatially Situated Event

It then governs Event Participation through five operational
modules:

EPIM — Event Participant Identification
Module

EPRM — Event Participation Role Module

EPAM — Event Actor Association Module

EPMAM — Event Machine & Autonomous Actor
Module

EPCM — Event Participation Continuity
Module

Together, these modules operationalize the Parent Standard
without changing its architecture-level governance boundary.

TREPS ultimately produces: Governed
Participatory Event

This becomes the input to TRVAS. ------------------------------
Why This Matters for Tax Infrastructure

Tax systems frequently need to determine which parties possess
legally relevant roles.

But those determinations should not begin from an ungoverned
participant list.

TREPS creates a jurisdiction-neutral participation layer before
tax law is applied.

The model becomes:

Operational Event

↓

Governed Participation

↓

Jurisdictional Legal
Classification

rather than:

Raw Transaction Record

↓

Immediate Legal Assumption

This separation allows different jurisdictions to evaluate the
same governed participation structure according to their own
laws.

For example:

One Governed Participation Structure

↓

Jurisdiction A Evaluation

One Governed Participation Structure

↓

Jurisdiction B Evaluation

One Governed Participation Structure

↓

Jurisdiction C Evaluation

TREPS does not require the underlying operational event to be
rewritten for each jurisdiction. ------------------------------
What Organizations Gain from TREPS

TREPS provides organizations with a structured method for
separating operational participation facts from downstream legal
interpretations.

Its use can provide: clearer participant attribution; more
consistent actor-event relationships; support for complex
multi-party events; support for AI-agent and machine
participation; improved traceability; preservation of uncertainty
and conflict; cleaner separation between operational and legal
data; reusable event structures across jurisdictions; reduced
dependence on simplistic buyer/seller models; and stronger inputs
for downstream tax engines, compliance systems, audit processes,
and jurisdiction-specific analysis.

The practical result is a participation representation that can
survive changes in tax rules because the operational event itself
is not defined by one jurisdiction's current legal
interpretation. ------------------------------ Use Case 1 —
Multi-Party Digital Marketplace

A customer purchases a product through an international digital
marketplace.

The operational event may involve: customer; merchant;
marketplace; payment provider; logistics provider; digital
infrastructure; and other supporting systems.

A conventional transaction record may contain all of these actors
without clearly distinguishing which materially participate in
the governed event and what operational role each performs.

TREPS establishes the governed participation structure.

It separates actors merely associated with the event from actors
materially participating in it and preserves their operational
roles and relationships.

The resulting Governed Participatory Event can then be passed to
downstream taxation systems.

TREPS does not determine whether the marketplace is legally the
supplier, whether the merchant is the taxpayer, whether the
payment provider has a reporting obligation, or which
jurisdiction may tax the transaction.

Those are subsequent legal determinations.
------------------------------ Use Case 2 — Autonomous Machine
Economy

An industrial machine identifies that a replacement component is
required.

An AI agent evaluates available suppliers.

The agent autonomously selects a provider and initiates
procurement.

A payment system authorizes the transaction.

Another autonomous system coordinates delivery.

A robot receives and installs the component.

Several organizations, digital systems, AI agents, machines, and
infrastructure providers may appear within the operational
record.

TREPS establishes which actors materially participated in the
governed event and preserves their distinct participation
relationships.

It does not automatically replace the AI agent with its
developer, the machine with its owner, or the autonomous system
with a supervising human merely to make the event fit a
traditional human-centric transaction model.

The resulting participation structure preserves the operational
reality.

Jurisdiction-specific systems can subsequently determine legal
attribution, taxpayer status, liability, reporting obligations,
and other tax consequences. ------------------------------
Canonical Boundary

TREPS governs who or what materially participates in a
Tax-Relevant Event and how that participation is represented as
part of the governed event.

It does not determine complete actor identity, ownership,
authority, accountability, responsibility, liability, value
ownership, taxpayer status, Tax Jurisdiction, tax nexus,
permanent establishment, place of supply, taxability, Tax
Liability, or another jurisdiction-specific legal consequence.

Its role is to preserve operational participation before legal
interpretation begins.

Canonical Closing Statement

TREPS establishes the governed participation layer between the
actors involved in operational reality and the legal
classifications that taxation systems may later assign to them.

Knowing who or what participated is not the same as deciding what
that participation means under law.

Participant ≠ Taxpayer.

TREGA™ governs the event. The jurisdiction governs the tax.