A landlord's notice under section 125 given in respect of a flat shall, as regards improvement contributions, contain—
the estimates required by this section, together with a statement of the reference period adopted for the purpose of the estimates, and
a statement of the effect of paragraph 16C of Schedule 6 (which restricts by reference to the estimates the amounts payable by the tenant).
Estimates are required for works in respect of which the landlord considers that costs may be incurred in the reference period.
The works to which the estimates relate shall be itemised and the estimates shall show—
the amount (at current prices) of the likely cost of, and of the tenant's likely contribution in respect of, each item, and
the aggregate amounts of those estimated costs and contributions.