SEC-806 -- ELDER COTTAGE HOUSING UNITS. (a) Eligibility for Insurance.-Section 2 of the National Housing Act (12 U.S.C. 1703) is amended by adding at the end the following new subsection: "(i) For purposes of this section, the term `manufactured home' includes any elder cottage housing opportunity unit that is small, freestanding, barrier-free, energy efficient, removable, and designed to be installed adjacent to an existing 1- to 4-family dwelling.". (b) Demonstration Program.- (1) In general.-The Secretary of Housing and Urban Development shall carry out a program to determine the feasibility of including as an eligible development cost under section 202 of the Housing Act of 1959 the cost of purchasing and installing elder cottage housing opportunity units that are small, freestanding, barrier-free, energy efficient, removable, and designed to be installed adjacent to existing 1- to 4-family dwellings. In the conduct of the demonstration, the Secretary shall determine whether the durability of such units is appropriate for inclusion in the section 202 program. (2) Report.-The Secretary shall transmit a report to the Congress not later that January 1, 1992 on the results of the demonstration under subsection (a).