This Code shall apply to all or any class or classes of housing accommodations made subject to regulation pursuant to the RSL or any other provision of law, except the following housing accommodations for so long as they maintain the status indicated below:
(a) housing accommodations subject to the City Rent Law;
(b) housing accommodations owned, operated or leased by the United States, the State of New York, any political subdivision, agency or instrumentality thereof, any municipality or any public housing authority;
(c) housing accommodations for which rentals are fixed by the DHCR or HPD, unless, after the establishment of initial rents, the housing accommodations are made subject to the RSL pursuant to applicable law, or housing accommodations subject to the supervision of the DHCR or HPD under other provisions of law or the New York State Urban Development Corporation, or buildings aided by government insurance under any provision of the National Housing Act to the extent the RSL or any regulation or order issued thereunder is inconsistent with such act. However, housing accommodations in buildings completed or substantially rehabilitated prior to January 1, 1974, and whose rentals were previously regulated under the PHFL or any other State or Federal law, other than the RSL or the City Rent Law, shall become subject to the ETPA, the RSL and this Code, upon the termination of such regulation;