46 CFR § 91.55-20
Number of plans required
April 15, 2021
(a) Three copies of each plan are normally required so that one can be returned to the submitter. If the submitter desires additional approved plans, a suitable number should be submitted to permit the required distribution.
[CGFR 65-50, 30 FR 16974, Dec. 30, 1965, as amended by CGFR 69-116, 35 FR 6861, Apr. 30, 1970]