CFR /  Title 46  /  Part 64  /  Sec. 64.51 Tank parts marking.

Any part of a tank furnished by an outside supplier may not be used in a tank unless it bears--

(a) The Coast Guard symbol;

(b) The Marine Inspection Office identification letters;

(c) The word ``part'';

(d) The manufacturer's name and serial number; and

(e) The design pressure.