The land aforesaid, after being surveyed, shall be apportioned to the several States in sections or subdivisions of sections, not less than one-quarter of a section; and whenever there are public lands in a State subject to sale at private entry at $1.25 per acre, the quantity to which said State shall be entitled shall be selected from such lands within the limits of such State, and the Secretary of the Interior is directed to issue to each of the States in which there is not the quantity of public lands subject to sale at private entry at $1.25 per acre, to which said State may be entitled under the provisions of this subchapter, land scrip to the amount in acres for the deficiency of its distributive share; said scrip to be sold by said States and the proceeds thereof applied to the uses and purposes prescribed in said sections, and for no other use or purpose whatsoever: Provided, That in no case shall any State to which land scrip may thus be issued be allowed to locate the same within the limits of any other State, or of any Territory of the United States, but their assignees may thus locate said land scrip upon any of the unappropriated lands of the United States subject to sale at private entry at $1.25, or less, per acre: And provided further, That not more than one million acres shall be located by such assignees in any one of the States: And provided further, That no such location shall be made before July 2, 1863.