46 CFR §67.175

1. (a)When a vessel has been constructed entirely of new materials, no application for a new vessel determination need be made under this section. Application for initial documentation must be made in accordance with subpart K of this part.
2. (b)When parts of an existing vessel have been used in the construction of a vessel and the owner wants a determination that the resulting vessel is new in accordance with this part, the owner must file with the Director, National Vessel Documentation Center;
   1. (1)A builder's certification, as described in § 67.99;
   2. (2)A written statement describing the extent to which materials from the existing vessel were used in the construction and the extent to which those materials were torn down; and
   3. (3)Accurate sketches or blueprints of the hull and superstructure which must identify, where practicable, components of the old vessel.