later than 180 days after the date of enactment of this Act, the Administrator of General Services shall issue guidance relating to the procurement of reclaimed refrigerants to service existing equipment in public buildings. (B) Preference The guidance issued under subparagraph (A) shall give preference to the use of reclaimed refrigerants if— (i) the refrigerant was reclaimed by an individual or entity that is certified under the laboratory certification program of the Air Conditioning, Heating, and Refrigeration Institute