151. Certain officers required to assist officers of customs. The following officers are hereby empowered and required to assist officers of customs in the execution of this Act, namely:-
officers of the Central Excise Department;
officers of the Navy;
officers of the Central or State Governments employed at any port or airport;
such other officers of the Central or State Government or a local authority as are specified by the Central Govern- ment in this behalf by notification in the Official Gazette.
Instructions to officers of customs. 1[ 151A. Instructions to officers of customs. The Board may, ifit considers it necessary or expedient so to do for the purpose ofuniformity in the classi