diff --git a/fep/521a/fep-521a.md b/fep/521a/fep-521a.md
index aeee503..18537dd 100644
--- a/fep/521a/fep-521a.md
+++ b/fep/521a/fep-521a.md
@@ -36,7 +36,7 @@ The `Multikey` object MAY contain the `expires` property indicating the expirati
 
 ### Key IDs
 
-Identifiers SHOULD be generated by appending a fragment identifier to the actor ID. Different public keys of the same actor MUST be identified using different fragment IDs.
+Identifiers SHOULD be generated by appending a fragment identifier to the actor ID. That allows consumers to retrieve both actor object and associated keys with a single HTTP request. If actor's keys are identified using fragment identifiers, each key MUST have a unique fragment identifier.
 
 Resolution of a URI containing a fragment identifier is performed using the algorithm specified in section *3.4 Fragment Resolution* of [Controlled Identifiers][FragmentResolution] specification.