sule 66Regulations under the PCT Rule 66 Procedure before the International Preliminary Examining Authority. 66.1 Basis of the International Preliminary Examination (a) Subject to paragraphsRegulation 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 pounds