RP Metadata Policy Compliance Check

[SECtim]

Step 4 in Section 12.2.2.2 on RP processing of an explicit client registration response says:

The RP MUST ensure that the metadata it was registered with at the OP complies with the Trust Chain openid_relying_party policies, which Trust Chain is resolved using the trust_anchor_id and authority_hints claims of the received registration Entity Statement. The RP SHOULD perform this check by applying the resolved policies to the metadata as specified in Section 6.1.4.1, or utilize another equivalent method.

While the intention of this step is obvious, the second sentence remains vague: What exactly is to be checked here?
Should RP apply the resolved policies to the received metadata and check that this policy application did not change the metadata?
Or something different?

[selfissued]

At a minimum, applying the policies cannot result in any policy conflicts. I'll consider how to better describe this.

I don't know what the "or utilize another equivalent method" language is about. @rohe ?