Cesser of operation of Chapter Seven halts foreign travel tax prospectively while preserving prior acts and invoking General Clauses Act. Cesser of operation of Chapter VII of the Finance (No. 2) Act, 1971 removes the chapter's future legal effect in respect of the foreign travel tax while preserving actions and omissions that occurred before the cesser, and section six of the General Clauses Act, 1897 applies as if the chapter had been repealed by a Central Act.