of Indian housing units, contract expertise, and for training and technical assistance related to funding provided under this heading and other headings under this Act for the needs of Native American families and Indian country: Provided further , That of the funds made available under the previous proviso, not less than $2,000,000 shall be made available for a national organization as authorized under section 703 of NAHASDA ( 25 U.S.C. 4212 ): Provided further , That amounts made available under the previous two provisos may be used, contracted, or competed as determined by the Secretary: Provided further , That of the amount provided under this heading, $2,000,000 shall be made available for the cost of guaranteed notes and other obligations, as authorized by title VI of NAHASDA: Provided further , That such costs, including the costs of modifying such notes and other obligations, shall be as defined in section 502 of the Congressional Budget Act of 1974, as amended: Provided further , That these funds are available to subsidize the total principal amount of any notes and other obligations, any part of which is to be guaranteed, not to exceed $17,761,989: Provided further , That the Department will notify grantees of their formula allocation within 60 days of the date of enactment of this Act: Provided further , That for an additional amount for the Native American Housing Block Grants program, as authorized under title I of NAHASDA, $100,000,000 to remain available until September 30, 2023: Provided further , That the Secretary shall obligate this additional amount for competitive grants to eligible recipients authorized under NAHASDA that apply for funds: Provided further , That in awarding this additional amount, the Secretary shall consider need and administrative capacity, and shall give priority to projects that will spur construction and rehabilitation: Provided further , That up to 1 percent of this additional amount may be transferred, in aggregate, to Program Office Salaries and Expenses—Public and