Predicate type: Joint Authority

Type URI: https://probityai.github.io/agent-evidence-vectors/predicate/v1/joint-authority

Version: 0.1.0

Predicate Name: Joint Authority

Status: DRAFT, issued under a self-hosted predicateType URI. The URI will not move once a signed statement carries it. Record R4 of the restoration evidence profile, whose common members and bundle rules apply.

Purpose

Records, for an incident that crosses organisations, which party may act on which asset, under what kind of grant, and which indicators the parties share. When an agent operated by one organisation affects infrastructure run by another, the restart conditions in incident guidance assume a single owner; this record names the owners and the assignment so that each party's later R1 and R3 records can be read against it.

Model

The subject is the shared indicator set, by digest: one member whose digest holds only sha256 of the canonical list of shared indicators.

The predicate carries the common members and:

sharedIndicators: a non-empty sorted list of {sha256} digests of indicators both parties hold.
parties: at least two entries {id, organization, correlationId, authorityBasis, assets}. authorityBasis is as in R1; assets is a sorted list of asset identifiers the party may act on.
actions, optional: a list of {party, asset, record} naming actions already taken, where record is the {sha256} of the R1 statement authorizing it.

Rules

#	Rule	Code
1	Statement shape and Type URI as in R1	`statement-malformed`
2	The predicate has exactly its members, each well formed	`predicate-malformed`
3	Every closed value is registered	`closed-vocabulary-violation`
4	Every party carries `authorityBasis`	`authority-basis-missing`
5	The parties belong to at least two organisations	`single-organization`
6	Every action names a party in `parties` and an asset in that party's `assets`	`party-acts-outside-assignment`

A statement that passes every rule is accepted as assignment-recorded.

What it does not establish

That the parties agreed to the assignment beyond the signer's statement, or that a legal duty to notify was met. A record co-signed by every party is stronger than one signed by one; the envelope shows which it is.

Record format: draft-gilda-audit-agent-audit-record-03, Section 4 (an in-toto Statement carried in a DSSE envelope).