; (4) provide for specific housing activities sufficient to meet the tribe’s housing needs, including affordable housing needs, as identified pursuant to paragraph (3) within the periods referred to such paragraph, which shall include— (A) development of affordable housing (as such term is defined in section 4 of this Act ( 25 U.S.C. 4103 )); (B) development of conventional homes for rental, lease-to-own, or sale, which may be combined with affordable housing developed pursuant to subparagraph (A); (C) development of housing infrastructure, including housing infrastructure sufficient to serve affordable housing developed under the plan; and (D) investments by the investor partner for the tribe, the participating tribe, members of the participating tribe, and financial institutions and other outside investors necessary to provide financing for the development of housing under the plan and for mortgages for tribal members purchasing such housing; (5) provide that the participating tribe will agree to provide long-term leases to tribal members sufficient for lease-to-own arrangements for, and sale of, the housing developed pursuant to paragraph (4); (6) provide that the participating tribe— (A) will be liable for delinquencies under mortgage agreements for housing developed under the plan that are financed under the plan and entered into by tribal members; and (B) shall, upon foreclosure under such mortgages, take possession of such housing and have the responsibility for making such housing available to other tribal members; (7) provide for sufficient protections, in the determination of the Secretary, to ensure that the tribe and the Federal Government are not liable for the acts of the investor partner or of any contractors; (8) provide that the participating tribe shall have sole final approval of design and location of housing developed under the plan