Independent Researcher This document defines dsub, an OPTIONAL, descriptive claim naming the *decision subject*, the party an automated agent's action is taken _upon_, as distinct from the acting agent (act) and the delegating principal (sub). Its purpose is *audit legibility*: letting a record name the party a decision concerns, which is the precondition for that record ever being made legible to them. The claim is privacy- minimizing by construction and is NOT an input to the authorization decision; a Policy Decision Point MUST ignore it. This document defines representation only.