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Consent delegation is the formal, controlled transfer of consent-exercising authority from a principal to a designated delegate, enabling the delegate to grant, modify, or revoke consent within the boundaries defined by the delegation instrument. Delegation is a structured legal and technical act, not a general permission transfer, and must be bounded by the principal's own consent authority — delegates cannot be granted rights the principal does not themselves possess. All consent delegations must be recorded in a tamper-evident delegation registry and linked to the principal's verifiable identity.

A delegation chain is the ordered sequence of principals and delegates through which consent authority is successively transferred, each delegation bounded by the scope granted at the preceding level. Chain integrity requires that each link be cryptographically signed by the delegating party and that the aggregate scope at any level does not exceed the original principal's authority. Relying parties must validate the full chain before honoring a delegation claim, verifying that no link is expired, revoked, or scope-inflated.

Delegated consent scope is the explicitly bounded set of consent-exercising rights conveyed to a delegate, limiting the delegate's authority to the specific data categories, purposes, time windows, and actions specified in the delegation instrument. Scope definitions must be machine-enforceable and expressed in a standardized policy language to enable automated verification at the point of consent use. Any consent exercise by the delegate that exceeds the defined scope constitutes an unauthorized act that must be detectable and attributable through the delegation audit log.

A consent proxy is an entity — human, institutional, or AI — authorized by a principal to exercise consent rights on the principal's behalf, acting as an intermediary between the principal and the parties requiring consent. Proxy relationships must be grounded in an explicit, signed delegation instrument that defines the proxy's scope and duration of authority. Consent systems must distinguish between a proxy acting within delegated scope and unauthorized consent assumption, flagging the latter for human review.

Sub-delegation is the further transfer of delegated consent authority from an initial delegate to a third party, creating an additional link in the delegation chain. Sub-delegation must be explicitly permitted in the original delegation instrument; absent such authorization, delegates are prohibited from granting their delegated rights to others. Sub-delegation chains must be bounded by a maximum depth limit specified in the governance framework to prevent uncontrolled propagation of consent authority.

Delegation revocation is the formal act of withdrawing a previously issued consent delegation, immediately terminating the delegate's authority to exercise the consented rights and propagating the revocation to all downstream delegates and relying parties. Revocation must be cryptographically recorded in the delegation registry and reflected in the credential revocation index within the SLA window defined by the governance framework. Revocation of a parent delegation must automatically cascade to all sub-delegations derived from it.

A delegation attestation is a cryptographically signed, verifiable assertion confirming that a consent delegation was issued by an authorized principal, that the delegate's identity is correctly referenced, and that the delegation scope is within the principal's own authority. Attestations are issued by the consent management system or an independent audit service and serve as the trust anchor for downstream parties evaluating the validity of a delegation claim. Attestation schemas must specify the minimum fields required to support automated chain validation.

A consent mandate is a formal, legally enforceable instrument issued by a principal that authorizes a designated delegate to exercise specific consent rights within defined boundaries, analogous to a power of attorney for digital consent transactions. Mandates must be signed by the principal using their verifiable identity credentials and registered in the consent delegation registry for auditability. Mandates expire at a defined time or upon occurrence of a terminating condition, and may be revoked by the principal at any time.

A delegation token is a machine-readable, cryptographically signed artifact encoding the scope, duration, delegate identity, and principal reference of a consent delegation, designed for presentation to relying parties as proof of delegated authority. Tokens are structured as verifiable credentials or signed JWTs and must include references to the revocation index to enable real-time validity checking. Delegation token schemas must define nesting rules for sub-delegation tokens to enable automated chain validation without recursive registry lookups.

A principal delegation record is a persistent, auditable entry in the consent delegation registry documenting all delegations issued, modified, or revoked by a specific principal, providing a complete history of the principal's consent authority transfers. Records include the delegation token reference, delegate identity, scope definition, issuance and expiry timestamps, and any revocation events. Principal delegation records are a mandatory component of consent governance infrastructure in regulated sectors requiring demonstrable accountability for consent decisions.

Delegation boundary enforcement comprises the technical and policy mechanisms that prevent a delegate from taking consent actions outside the scope explicitly authorized in their delegation instrument, including scope validation at consent execution time, real-time revocation checks, and automated flagging of out-of-scope attempts. Enforcement must operate at the data processing layer, not merely at the access control gateway, to prevent scope violations that arise from deferred or batch processing. Enforcement failure audit logs must be generated and escalated to the principal and compliance function within defined SLA windows.

A consent authority grant is the formal act of issuing consent-exercising rights to a delegate, instantiated as a signed delegation instrument that specifies the granted scope, duration, and any conditions on exercise. Grants are unilateral acts of the principal and take effect upon signature and registry recording, not upon the delegate's acknowledgment. Grant governance must define whether re-grants from the same principal to the same delegate supersede or accumulate with prior grants.

Delegation expiry is the automatic termination of a delegation instrument upon reaching a defined time boundary or triggering condition, after which the delegate's consent authority is immediately void without requiring an explicit revocation act. Expiry is enforced at the token validation layer and must be reflected in revocation indices within the defined propagation SLA. Governance frameworks must specify re-authorization procedures for delegations that expire without replacement, preventing inadvertent continuity of unauthorized consent exercise.

Transitive consent delegation is a delegation model in which authority flows recursively through a chain of delegates, each authorized to further sub-delegate within the bounds of their own received scope. Transitivity introduces cumulative scope reduction requirements — each level may grant at most the scope received, preventing authority amplification across the chain. Governance frameworks for transitive delegation must set maximum chain depth limits and mandate full chain validation by relying parties before honoring terminal-level consent claims.

A delegation audit log is a tamper-evident, time-stamped record of all delegation events — including grant, scope modification, sub-delegation, and revocation — associated with a specific principal or delegation chain, providing the compliance evidence required for regulatory reporting and dispute resolution. Logs must be cryptographically integrity-protected, retained for the minimum period specified by applicable regulations, and exportable in standardized formats. Real-time log streaming to independent audit endpoints is recommended for high-risk delegation contexts.