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A Release for a Ringtone shall meet the following rules in addition to the rules stipulated in Clauses 5.2 and 5.3 :
(1) Primary Resources shall be identified with a ProprietaryId or an ISRC.
Conformance Weighting: 1 (See the ERN Conformance Standard for details.)
(2) There shall only be one ResourceGroup in the main Release.
Conformance Weighting: 1
(3) The ResourceGroupContentItem shall only contain:
One ReleaseResourceReference pointing to the Primary Resource; and
One LinkedReleaseResourceReference pointing to an Image of type FrontCoverImage (if a Secondary Resource is provided).
Conformance Weighting for items (3)1-2: 1
(4) A RelatedRelease of type IsReleaseFromRe lease shall be provided if such a Release exists and the Message Sender has reasonable access to it.
Conformance Weighting: 2