Where, under subsection (5)(a) of section 14A above, a tenant refers to the appropriate tribunal a notice under subsection (1) of that section, the appropriate tribunal shall determine the amount by which, having regard to the provisions of section 14(3A) above, the existing rent might reasonably be increased to take account of the tenant's liability to make payments to the landlord in respect of council tax.
Where a notice under section 14A(1) above has been referred to the appropriate tribunal, then, unless the landlord and the tenant otherwise agree, the existing rent shall be increased by the amount determined by the appropriate tribunal with effect from the beginning of the new period specified in the notice or, if it appears to the appropriate tribunal that that would cause undue hardship to the tenant, with effect from such later date (not being later than the date the increase is determined) as the appropriate tribunal may direct.
In any case where—
the appropriate tribunal shall make a determination in relation to the section 13 reference before making their determination in relation to the section 14A reference, and if in such a case the date specified in the notice under section 13(2) above is later than the date specified in the notice under section 14A(1) above, the rent determined under the section 14A reference shall not take effect until the date specified in the notice under section 13(2).
In this section "rent" has the same meaning as in section 14 above; and section 14(4) above applies to a determination under this section as it applies to a determination under that section.