(B) None of the shareholders or members has an interest, directly or indirectly, in more than 4 rental units in the District of Columbia. A shareholder or member of a cooperative housing association owning a proprietary lease or occupancy agreement for a rental unit in an association shall not be deemed to have an indirect interest in any other rental unit in any structure owned by a cooperative housing association solely by virtue of ownership of a stock or membership certificate, proprietary lease, or other evidence of membership in the association; and
(C) The shareholders or members owning the proprietary lease or occupancy agreement for the rental unit file with the Rent Administrator a claim of exemption statement which consists of an oath or affirmation by the shareholders or members of a valid claim to the exemption. The claim of exemption statement shall also contain the signature of each person having an interest, direct or indirect, in the proprietary lease or occupancy agreement for the rental unit. Any change in the ownership of the proprietary lease or occupancy agreement or change in the shareholder’s or member’s interest in any other rental unit which would invalidate the exemption claim must be reported in writing to the Rent Administrator within 30 days of the change;
(6) [Disapproved.]
(7) Housing accommodations for which a building improvement plan has been executed under the apartment improvement program and housing accommodations which receive rehabilitation assistance under other multi-family assistance programs administered by the Department of Housing and Community Development, if: