Residents of non-public housing that would be displaced by a homeownership program are eligible for assistance under the Uniform Relocation Act and part 42 of this title. For purposes of this part, a family that was over-income (i.e., an individual or family that is not a low-income family) at the time of initial occupancy of public housing and was admitted in accordance with section 3(a)(5) of the 1937 Act, is treated as a non-purchasing resident of non-public housing.