§4. As a compact with the United States relating to the management and disposition of the Hawaiian home lands, the Hawaiian Homes Commission Act, 1920, as amended, shall be adopted as a provision of the Constitution of said State, as provided in section 7, subsection (b) of this Act, subject to amendment or repeal only with the consent of the United States, and in no other manner: Provided, That (1) sections 202, 213, 219, 220, 222, 224, and 225 and other provisions relating to administration, and paragraph (2) of section 204, sections 206 and 212, and other provisions relating to the powers and duties of officers other than those charged with the administration of said Act, may be amended in the constitution, or in the manner required for State legislation, but the Hawaiian home-loan fund, the Hawaiian home-operating fund, and the Hawaiian home-development fund shall not be reduced or impaired by any such amendment, whether made in the constitution or in the manner required for State legislation, and the encumbrances authorized to be placed on Hawaiian home lands by officers other than those charged with the administration of said Act, shall not be increased, except with the consent of the United States; (2) that any amendment to increase the benefits to lessees of Hawaiian home lands may be made in the constitution, or in the manner required for State legislation, but the qualifications of lessees shall not be changed except with the consent of the United States; and (3) that all proceeds and income from the "available lands", as defined by said Act, shall be used only in carrying out the provisions of said Act.