§ 28.905 § 28.905 Repairs and alterations. No repairs or alterations affecting the safety of the vessel with regard to the hull, machinery, or equipment, shall be made without the notification of a Coast Guard Representative.
46 CFR §28.905
46 CFR Part 28
TL;DR
No repairs or alterations affecting the safety of the vessel with regard to the hull, machinery, or equipment, shall be made without the notification of a Coast Guard Representative.