Section 11F of Chapter 25A of the Massachusetts General Laws is hereby amended by adding after the following the words in paragraph (c): “impacted watershed as determined by the department in consultation with relevant state and federal agencies having oversight and jurisdiction over hydropower facilities”, the following:

(“Environmental Standards”), and in any case in which pursuant to action initiated with or by the Federal Energy Regulatory Commission (FERC) after January 1, 1992 the FERC either reviewed and approved increased capacity or efficiency at an existing facility, or issued an order with respect to increased capacity or efficiency improvements to revise the authorized installed capacity at an existing facility, where the operation or such increased capacity or efficiency does not exceed the maximum discharged of the original turbine or turbines, then such increased capacity or efficiency at each such existing facility shall be deemed to have satisfied the Environmental Standards, defined above, and except as limited by the following subsection (6) (ii) shall be certified as a Class 1 renewable energy generating source, without further review;