Customs of the Port refers to the local rules, interpretations, and practices applied by customs officials at a specific port of entry — distinct from national regulations. Even within the same country, different ports can have different procedural norms for how they handle inspections, documentation review, and cargo release.
For project cargo moving through unfamiliar ports, COP matters. A port in Houston may have a different tolerance for certain documentation formats than one in Baltimore. Some ports have established informal practices around overtime examinations, inspection scheduling, or how they handle oversize cargo staging.
An experienced freight forwarder or customs broker with direct relationships at the specific port is worth their fee precisely because they know these local nuances — the kind of institutional knowledge that doesn’t appear in any official regulation.