1. Short title This Act may be cited as the PURPA Modernization Act of 2017 . 2. Location of small power production facilities (a) Rebuttable presumption The Federal Energy Regulatory Commission shall, not later than 180 days after the date of enactment of this Act, publish in the Federal Register a final rule amending its regulations implementing section 3(17)(A)(ii) of the Federal Power Act ( 16 U.S.C. 796(17)(A)(ii) ), regarding the method for determining whether facilities are considered to be located at the same site as the facility for which qualification is sought for the purpose of calculating power production capacity, to provide a rebuttable presumption that— (1) facilities located one mile or more away from each other are not located at the same site