Vessels contracted for prior to November 19, 1952.

(a) Towing vessels contracted for construction prior to November 19, 1952, must meet the applicable provisions of this part concerning the number and general type of equipment required. (b) Existing equipment and installations previously approved, but not meeting the applicable requirements for approval by the Commandant, may be continued in service so long as they are in good condition. (c) All new installations and replacements must meet the requirements of this part.