2. Definitions. In theses rules, unless the context otherwise requires, - (a) "Act" means the Finance Act, 1994 (32 of 1994);  (b) "Authority" means the Authority for Advance Rulings constituted under section 28F of the Customs Act, 1962 (52 of 1962);  (c) "Form-Application for Advance Ruling (Service Tax)" means the form annexed to these rules;  (d) Words and expressions used and not defined herein but defined in the Act shall have the meanings respectively, assigned, to them in the Act.