The Secretary of the Interior is authorized to cooperate with the States, through their respective State fish and game departments, in wildlife-restoration projects as hereinafter in this chapter set forth; but no money apportioned under this chapter to any State shall be expended therein until its legislature, or other State agency authorized by the State constitution to make laws governing the conservation of wildlife, shall have assented to the provision of this chapter and shall have passed laws for the conservation of wildlife which shall include a prohibition against the diversion of license fees paid by hunters for any other purpose than the administration of said State fish and game department, except that, until the final adjournment of the first regular session of the legislature held after September 2, 1937, the assent of the Governor of the State shall be sufficient. The Secretary of the Interior and the State fish and game department of each State accepting the benefits of this chapter, shall agree upon the wildlife-restoration projects to be aided in such State under the terms of this chapter and all projects shall conform to the standards fixed by the Secretary of the Interior. One of the purposes of this chapter is to provide financial and technical assistance to the States for the promotion of hunting and recreational shooting.