(ii) solely by virtue of article 7-C of the MDL;
(8) exemption pursuant to this subdivision shall not apply to or become effective with respect to housing accommodations for which the commissioner determines or finds that the owner or any person acting on his or her behalf, with intent to cause the tenant to vacate, engaged in any course of conduct (including, but not limited to, interruption or discontinuance of required services) which interfered with or disturbed or was intended to interfere with or disturb the comfort, repose, peace or quiet of the tenant in his or her use or occupancy of the housing accommodations. In connection with such course of conduct, any other general enforcement provision of the RSL and this Code shall also apply;
(9) during the period of effectiveness of an order issued pursuant to section 2523.4 of this Title for failure to maintain required services, which lowers the legal regulated rent below the applicable amount qualifying for deregulation as provided in this subdivision, during the time period specified in this subdivision, a vacancy shall not qualify the housing accommodation for exemption under this subdivision;
(10)