In any case where—
the landlord may serve on the tenant a notice in the prescribed form proposing an increased rent to take account of the tenant's liability to make payments to the landlord in respect of council tax, such increased rent to take effect at the beginning of a new period of the tenancy specified in the notice being a period beginning not earlier than one month after the date on which the notice was served.
The case falls within this subsection if—
The case falls within this subsection if a notice has been served under section 13(2) above before 1st April 1993 but no increased rent has taken effect before that date.
No notice may be served under subsection (1) above after 31st March 1994.
Where a notice is served under subsection (1) above, the new rent specified in the notice shall take effect as mentioned in the notice unless, before the beginning of the new period specified in the notice—
Nothing in this section (or in section 14B below) affects the right of the landlord and the tenant under an assured tenancy to vary by agreement any term of the tenancy (including a term relating to rent).