§ 58103. Employing another person as managing or operating agent
(a)
 Prohibition.— 
Except with the written consent of the Secretary of Transportation, a contractor holding a contract under the operating-differential subsidy program or under chapter 
575 of this title may not—
(b)
 Applicability of Provisions to Charterer.— 
If a charter prohibited by this section is made, the person operating the chartered vessel is subject to all the provisions of this subtitle and the operating-differential subsidy program, including limitations of profits and salaries.