Definitions clarify that key terms adopt meanings from the Customs Act, fixing officials and statutory reference points. Defines principal terms for the warehouse regulations: Act means the Customs Act; 'bond officer' is the customs officer in charge of a warehouse; 'Controller of Certifying Authorities' denotes the authority under the Information Technology Act; 'section' means a section of the Act. Any term not defined in these regulations takes the meaning assigned in the Customs Act, ensuring terminological and interpretive consistency with the primary statute.