(b) Subsection (a) does not apply to the following:
(1) Housing units acquired under section 404 of the Housing Amendments of 1955 (
42 U.S.C.
1594a).
(2) Housing units leased under section
2828 of this title.
(3) Housing units acquired under the Homeowners Assistance Program referred to in section
2832 of this title.
(4) Housing units acquired without consideration.
(5) Replacement housing units constructed under section
2825 (c) of this title.
(6) Housing units constructed or provided under section
2869 of this title.