The Secretary of the Treasury shall, upon the request of the Governor of American Samoa, administer and enforce the collection of all customs duties derived from American Samoa, without cost to the government of American Samoa. The Secretary of the Treasury, in consultation with the Governor of American Samoa, shall make every effort to employ and train the residents of American Samoa to carry out the provisions of this section. The administration and enforcement of this section shall commence October 1, 1980.