DG-37: Is it possible to submit a document to support the fact that the system is existing other than: (i) Interconnection Agreement; or (ii) Net metering application approval letter; (iii) or Final system inspection confirmation; or (iv) PJM-EIS GATS/M-RETS system registration application and approval letter; or (v) permission to operate letter?

Yes.  The RFP Rules provide that other relevant documentation may be provided, such as a Certificate of Completion.  Other such documents will be reviewed on a case-by-case basis.