SCMTR amendments to accepted Conveyance Summary Notices must be...

SCMTR amendments to accepted Conveyance Summary Notices must be filed through the SCA message, while amendments affecting a related Sea Arrival Manifest require the corresponding SAA message. VCNs and rotation numbers cannot be amended through SCA, and post-Sea Entry Inwards amendments require jurisdictional Customs approval before system reflection. Undeclared House Bills must be added through SAA splitting procedures; structural changes, including Straight-to-Consolidated Bill conversions, consolidator PAN changes, or reference changes, require deletion and re-addition rather than field edits. CSN deletion after SAM filing needs officer action or approval. The designated proper officer may examine supporting material and require clarification; post-SEI requests may require justification and remain subject to applicable charges and statutory requirements.