SECTION 1. Section twelve hundred and two of Act Numbered twenty-seven hundred and eleven, known as the Administrative Code, is hereby further amended to read as follows:
"SEC 1202. Limiting number of foreign personnel on board vessels.—No Philippine vessel operating in the coastwise trade or on the high seas shall be permitted to have on board more than one master or one mate and one engineer who are not citizens of the United States or of the Philippine Islands, but the master, mate or engineer so employed must hold a license under section one thousand one hundred and ninety-nine hereof. No other person who is not a citizen of the United States or of the Philippine Islands shall be an officer or a member of the crew of such vessel. Any such vessel which fails to comply with the terms of this section shall be required to pay an additional tonnage tax of fifty centavos per net ton per month during the continuance of said failure: Provided, That a vessel registered under section eleven hundred and seventy-two of this Code operating on the high seas and not engaged in the coastwise trade may employ foreign seamen as members of its crew except watch and engine-room officers : And provided, further, That nothing herein contained shall be construed as revoking or modifying any of the existing provisions of the Acts of the United States Congress regulating immigration."