Indexed REC-20: Would projects in PJM that are awarded a contract need to obtain a WMPA (wholesale market participation agreement) from PJM?

No, it is not a specific requirement under the RFP for Projects registered to PJM to obtain a WMPA from PJM. It is the responsibility of Seller to obtain all the necessary authorizations, approvals, consents, notices, filings and permits for it to perform under the Indexed REC Contract.