sule 66Regulation IV -1- Rule 66 RULE 66. ORGANIC SOLVENTS (Adopted 7172; Rev. Effective 72595) (a) A person shall not discharge into the atmosphere more than 15 poundsNotes (History of Amendments in Bare Text): 1. CGST Rule 66 introduced vide Notification 102017, effective 01072017.. 2. Amendments in sub-rule (2) from 28062019