This entry lists the states with Renewable Portfolio Standard (RPS) policies that accept generation located in District of Columbia as eligible sources towards their RPS targets or goals. For specific information with regard to eligible technologies or other restrictions which may vary by state, see the RPS policy entries for the individual states, shown below in the Authority listings. Typically energy must be delivered to an in-state utility or Load Serving Entity, and often only a portion of compliance targets may be met by out-of-state generation. In addition to geographic and energy delivery requirements, ownership, registry, and other requirements may apply, such as resource eligibility, generator vintage and capacity limitations, as well as limits on Renewable Energy Certificate (REC) vintage. The listing applies to RPS Main Tiers only, and excludes solar or distributed generation that may require interconnection only within the RPS state. This assessment is based on energy delivery requirements and reasonable transmission availability. Acceptance of unbundled RECs varies. There may be additional sales opportunities in RPS states outside the Eastern Interconnection. REC prices in markets with voluntary goals (Indiana, North Dakota, South Dakota, Virginia) may be lower.