StacksVerified U.S. regulatory reference

46 CFR §50.10-35

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The term constructed means the keel has been laid or, for vessels with no keel, assembly of at least 50 tons or 1% of the estimated mass of all structural material, whichever is less, has been completed.