Contrast "delegation" claim with existing "act" claim

Author: selfissued

openid-federation-1_0.xml

@@ -7719,6 +7719,18 @@ HTTP/1.1 302 Found
 	  to represent delegation of the right to issue Trust Marks
 	  with a particular identifier.
 	</t>
+	<t>
+	  Note that the <spanx style="verb">delegation</spanx> Claim is both
+	  syntactically and semantically distinct from the existing
+	  <spanx style="verb">act</spanx> Claim <xref target="IANA.JWT.Claims"/>.
+	  <spanx style="verb">act</spanx> is a JSON object whereas
+	  <spanx style="verb">delegation</spanx> is a StringOrURI.
+	  Semantically, the Delegation JWT defined in <xref target="delegation_jwt"/>
+	  carries a signature by an issuer cryptographically proving
+	  the right to delegate to the party.
+	  The <spanx style="verb">act</spanx> Claim, carrying no signature,
+	  cannot achieve this.
+	</t>
       </section>
 
       <section anchor="logo_uriClaim" title='"logo_uri" (Logo URI) Claim'>