Online registration and PAN-based requirement mandate digital filing and verification procedures for excise registrations and cancellations. Amendment mandates online filing for registration, de-registration, and amendments on the specified government website; requires PAN-based registration for applicants except Government Departments with migration timelines for temporary registrants; mandates provision of e-mail, mobile number, and Business Transaction Numbers; authorizes issuance of an online Registration Certificate within two days pending post-facto verification; prescribes submission of specified documents at verification; requires physical verification within seven days with opportunity to rectify defects within fifteen days and sets grounds and procedures for cancellation, transfer, change in constitution, and de-registration.