Authorised courier registration requires financial security and bond, enabling multi station operations and electronic-mode declarations subject to conditions. Registration as an Authorised Courier requires registration with the jurisdictional Commissioner of Customs, differing initial validity periods for manual and electronic modes, bank certification or asset proof to demonstrate financial viability, and execution of a bond with a location-specific security deposit in approved forms. Registrants remain liable for any duty shortfall with interest. Operation at multiple airports or land customs stations is permitted upon prescribed intimation and separate bond/security at each location, and existing registrants at automated sites may adopt electronic-mode declarations subject to electronic-mode conditions.