Existing Wording: An ETag header SHALL be returned with the conformance resource. The value of the header SHALL change if the conformance statement itself changes.

Proposed Wording: An ETag header SHOULD be returned with the conformance resource. The value of the header SHOULD change if the conformance statement itself changes.

Comment:

Etags are not required on other resources, and should not be required for this resource; doing so would require special handling for the server to treat conformance differently than other resources.