Applications for ERCs for emission sources not subject to Part 201 of this Title including but not limited to mobile sources and demand side management ERCs will be approved by the department on a case-by-case basis upon submittal of acceptable protocols. The department will prepare a SIP revision approval letter which sets forth the appropriate enforceable terms and conditions pursuant to which the ERCs are being approved and submit the package as a single source SIP revision to EPA for approval following public notice of the ERCs. Upon approval of the SIP revision by EPA, the department will publish the ERCs in the ERC Registry.