4 



1 dotennines as a result of a rciuspcotion that such siil)r.ioisIl)l(- 



2 vessel is in violation of this Act or any regiilation issui'd 



3 under this Act, and that it is in the interest of safety, he 



4 may amend, suspend, or revoke a certificate of inspection. 



5 Sec. o. (a) The Secretary may issue submersible vessel 



6 operators licenses in accordance with regulations prescribed 



7 by him, to applicants found qualified as to age, character, 



8 habits of life, experience, professional qualifications, and 



9 phj'sical and mental fitness. 



10 (b) The Secretar}' may prescribe with respect to any 



11 license issued such terms, conditions, limitations as to dura- 



12 tion thereof, periodic or special examinations, tests of physical 

 lii fitness, and other matters as he determines necessary to as- 



14 sure safety in the operation of submersible vessels. 



15 (c) The Secretary may suspend or revoke a license 

 1(> issued under this section if the holder — 



17 ( I ) has violated any law or regulation intended to 



18 promote marine safety or protect navigable waters, 



19 (2) is physically, mentally, or professionally incom- 



20 petent, or 



21 (3) has committed an act of misconduct or negli- 



22 gence while operating such a vessel. 



23 (d) Xo person shall operate any submersible vessel with- 



24 out an operator's license if by regulations established under 

 2j this section he is required to have a valid submersible vessel 



727 



