14 U.S.C. § 638 : US Code - Section 638: Coast Guard ensigns and pennants

Search 14 U.S.C. § 638 : US Code - Section 638: Coast Guard ensigns and pennants

(a) Coast Guard vessels and aircraft shall be distinguished from
other vessels and aircraft by an ensign, pennant, or other
identifying insignia of such design as prescribed by the Secretary.
Such ensign, pennant, or other identifying insignia shall be
displayed in accordance with regulations prescribed by the
Secretary.
(b) No vessel or aircraft without authority shall carry, hoist,
or display any ensign, pennant, or other identifying insignia
prescribed for, or intended to resemble, any ensign, pennant, or
other identifying insignia prescribed for Coast Guard vessels or
aircraft. Every person violating this subsection shall be fined not
more than $5,000, or imprisoned for not more than two years, or
both.