From and after the filing with the Secretary of the Interior or such officer as he may designate of satisfactory proof of residence, improvement, and cultivation for the five years required by law, persons who have, or shall make, homestead entries within reclamation projects under the provisions of the Act of June 17, 1902, may assign such entries, or any part thereof, to other persons, and such assignees, upon submitting proof of the reclamation of the lands and upon payment of the charges apportioned against the same as provided in the said Act of June 17, 1902, may receive from the United States a patent for the lands: Provided, That all assignments made under the provisions of this section shall be subject to the limitations, charges, terms, and conditions of the reclamation Act.