Sea Cargo Manifest filing: phased mandatory electronic compliance and ICEGATE registration with extended transitional relief for filings. The Sea Cargo Manifest and Transhipment Regulations establish phased electronic filing and stakeholder registration on ICEGATE, replacing legacy import/export manifests with SAM, SEI, SDM, SDN and permitting CSN filings by parties to the transport document. The regime prescribes filing and amendment timelines, introduces national container and transhipment bond categories (CG and TG), reduces securities and exempts certain licensed brokers and AEOs from fresh securities, and implements a Cargo Identification Number system (PCIN/MCIN) to link declarations and streamline transhipment procedures. Noncompliance attracts penalties per the regulations.