Regulation 33 Improvement-specific instalments – exceptions to fixed amount
The energy plan must not provide for the amount of improvement-specific instalments to increase during the payment period, except—
(a)
where the plan applies to a non-domestic property and the increase is due to a change in the rate of interest charged under the plan; or
(b)
where the rate of interest charged is fixed for the payment period and the increase does not exceed 2 per cent per year (including any component of the instalment that represents interest).