isIssuedAtRequired property
§7.3 item 17 — issuedAtRequirement is REQUIRED, raising §4.2's issuedAt
SHOULD to a MUST for this specification's documents. A specification
defining a consequential Trust Task (§2) must declare it, so that §7.2
item 11's duplicate-execution record always has a window to sit in.
This is the specification's requirement, published in the registry — distinct from a consumer's own freshness posture, which is chosen at the call site and applied to every document.
Implementation
final bool isIssuedAtRequired;