In all cases, the just compensation authorized by this section shall be determined and paid by the Secretary of Transportation as soon as practicable, but if the amount of just compensation determined by the Secretary is unsatisfactory to the person entitled thereto; such person shall be paid, as a tentative advance only, 75 per centum of the amount so determined and shall be entitled to sue the United States to recover such amount as would equal just compensation therefor, in the manner provided for by sections
1346 and
1491 of title
28: Provided, however, That in that event of an election to reject the amount determined by the Secretary of Transportation and to sue in the courts, the excess of any amounts advanced on account of just compensation over the amount of the court judgment will be required to be refunded.
The existence of any valid claim by way of mortgage or maritime claim or attachment lien upon such vessel shall not prevent the taking thereof pursuant to this section: Provided, however, That in the event any such claim exists the Secretary of Transportation may in his discretion deposit such portion of the compensation hereunder, or advances on account thereof, as may equal but not exceed the amount of such claims in respect of the vessel, with the Treasurer of the United States, and the fund so deposited shall be available for the payment of such compensation, and shall be subject to be applied to the payment of the amount of any valid claim by way of mortgage or maritime lien or attachment lien upon such vessel, or of any stipulation therefor in a court of the United States, or of any State, subsisting at the time of such requisition or taking of title or possession; the holder of any such claim may commence prior to June 30, 1943, or within six months after the first such deposit with the Treasurer and publication of notice thereof in the Federal Register, whichever date is later, and maintain in the United States district court from whose custody such vessel has been or may be taken or in whose territorial jurisdiction the vessel was lying at the time of requisitioning or taking of title or possession, a suit in admiralty according to the principles of libels in rem against the fund, which shall proceed and be heard and determined according to the principles of law and to the rules of practice obtaining in like cases between private parties, and any decree in said suit shall be paid out of the first and all subsequent deposits of compensation; and such suit shall be commenced in the manner provided by section
742 of this Appendix and service of process shall be made in the manner therein provided by service upon the United States attorney and by mailing by registered mail to the Attorney General and the Secretary of Transportation and due notice shall under order of the court be given to all interested persons, and any decree shall be subject to appeal and revision as now provided in other cases of admiralty and maritime jurisdiction.