Sec. 21.
That from and after February 1, 1922, the coastwise laws of the United States shall extend to the island Territories and possessions of the United States not now covered thereby, and the board is directed prior to the expiration of such year to have established adequate steamship service at reasonable rates to accommodate the commerce and the passenger travel of said islands and to maintain and operate such service until it can be taken over and operated and maintained upon satisfactory terms by private capital and enterprise: Provided, That if adequate shipping service is not established by February 1, 1922, the President shall extend the period herein allowed for the establishment of such service in the case of any island Territory or possession for such time as may be necessary for the establishment of adequate shipping facilities therefor: Provided further, That until Congress shall have authorized the registry as vessels of the United States of vessels owned in the Philippine Islands, the Government of the Philippine Islands is hereby authorized to adopt, from time to time, and enforce regulations governing the transportation of merchandise and passengers between ports or places in the Philippine Archipelago: And provided further, That the foregoing provisions of this section shall not take effect with reference to the Philippine Islands until the President of the United States after a full investigation of the local needs and conditions shall, by proclamation, declare that an adequate shipping service has been established as herein provided and fix a date for the going into effect of the same.