§ 662. Requirement for prior authorization of appropriations
Amounts may be appropriated to or for the use of the Coast Guard for the following matters only if the amounts have been authorized by law after December 31, 1976:
(2)
For the acquisition, construction, rebuilding, and improvement of aids to navigation, shore or offshore establishments, vessels, or aircraft, including equipment related to the aids, establishments, vessels, or aircraft.
(4)
For research, development, test, or evaluation related to a matter referred to in clauses (1)–(3).