(C) The tenant engaged in conduct that unreasonably delayed or otherwise
prevented the landlord from commencing remedial action within the time period
described in subsection (2)(b)(I) of this section, from continuing to perform remedial
action, or from completely remedying or repairing the condition within a reasonable
time.
(II) A tenant otherwise has the burden of proof to establish a breach of the
warranty of habitability.
(c) Notwithstanding the circumstances described in subsection (3)(b)(I) of
this section, a landlord must reasonably continue to make efforts to commence or
continue performing remedial action to remedy or repair a condition that renders
the tenant's residential premises uninhabitable and for which the landlord has
notice. These efforts to commence or continue performing remedial action shall
include prompt correspondence and good faith cooperation with the tenant and
may require prompt correspondence and good faith cooperation with maintenance
staff, third-party contractors, a government official, or any other person whose
involvement is necessary to remedy or repair the condition.
(d) If a tenant denies entry to the dwelling unit and entry to the dwelling unit
is necessary to commence or continue performing remedial action, the presumptive
time periods described in subsection (3)(a)(II) of this section are tolled until the date
that the tenant proposes as a reasonable alternative date and time for entry or
another date and time that the landlord proposes and to which the tenant agrees in
accordance with subsection (6)(b) of this section.