SEC-421 -- PROGRAM AUTHORITY. (a) In General.-The Secretary is authorized to make- (1) planning grants to enable applicants to develop homeownership programs; and (2) implementation grants to enable applicants to carry out homeownership programs. (b) Authority To Reserve Housing Assistance.-In connection with a grant under this subtitle, the Secretary may reserve authority to provide assistance under section 8 of the United States Housing Act of 1937 to the extent necessary to provide rental assistance for a nonpurchasing tenant who resides in the project on the date the Secretary approves the application for an implementation grant, for use by the tenant in another project. (c) Authorization of Appropriations.-There is authorized to be appropriated for grants under this subtitle $51,000,000 for fiscal year 1991 and $280,000,000 for fiscal year 1992. Any amounts appropriated pursuant to this subsection shall remain available until expended.