Except as otherwise provided herein the Secretary of the Interior shall disburse and expend the amounts of money herein authorized to be appropriated, in accordance with and under the terms and conditions of the Act approved June 7, 1924: Provided, however, That the Secretary be authorized to cause necessary surveys and investigations to be made promptly to ascertain the lands and water rights that can be purchased out of the foregoing appropriations and earlier appropriations made for the same purpose, with full authority to disburse said funds in the purchase of said lands and water rights without being limited to the appraised values thereof as fixed by the appraisers appointed by the Pueblo Lands Board appointed under said Act of June 7, 1924 [set out below] and all prior Acts limiting the Secretary of the Interior in the disbursement of said funds to the appraised value of said lands as fixed by said appraisers of said Pueblo Lands Board be, and the same are, expressly repealed: Provided further, That the Secretary of the Interior be, and he is hereby, authorized to disburse a portion of said funds for the purpose of securing options upon said lands and water rights and necessary abstracts of title thereof for the necessary period required to investigate titles and which may be required before disbursement can be authorized: Provided further, That the Secretary of the Interior be, and he is hereby, authorized, out of the appropriations of the foregoing amounts and out of the funds heretofore appropriated for the same purpose, to purchase any available lands within the several pueblos which in his discretion it is desirable to purchase, without waiting for the issuance of final patents directed to be issued under the provisions of the Act of June 7, 1924, where the right of said pueblos to bring independent suits, under the provisions of the Act of June 7, 1924, has expired; Provided further, That the Secretary of the Interior shall not make any expenditures out of the pueblo funds resulting from the appropriations set forth herein, or prior appropriations for the same purpose, without first obtaining the approval of the governing authorities of the pueblo affected: And provided further, That the governing authorities of any pueblo may initiate matters pertaining to the purchase of lands in behalf of their respective pueblos, which matters, or contracts relative thereto, will not be binding or concluded until approved by the Secretary of the Interior.