1. For the purposes of section 39 the categories of electricity account are—

(a) Domestic Accounts, meaning electricity accounts held by final customers and which are identified by the distribution system operator as liable for distribution use of system charges at the rate for urban domestic customers or the rate for rural domestic customers;

(b) Small Accounts, meaning electricity accounts held by final customers which are not Domestic Accounts or Medium-Large Accounts;

(c) Medium-Large Accounts, meaning electricity accounts held by final customers which, in respect of each such account, the distribution system operator certifies as having a maximum import capacity of not less than 30kVA.

Computation of amount of levy payable by holders of individual electricity accounts

2. The amount of levy to be imposed on F490[or payment to be made in respect of] each electricity account in respect of a levy period F491[or payment period,] shall be computed—

(a) in the case of a Domestic Account by dividing the amount of the F492[levy or payment attributed to] that category of accounts in accordance with section 39(5A) by the number of electricity accounts certified by the distribution system operator as falling within that category;

(b) in the case of a Small Account by dividing the amount of the F492[levy or payment attributed to] that category of accounts in accordance with section 39(5A) by the number of electricity accounts certified by the distribution system operator as falling within that category;

(c) in the case of a Medium-Large Account by applying the formula in paragraph 3 of this Schedule.

Formula to be applied in computation of amount of levy payable by holders of Medium-Large electricity accounts

3. The amount of levy payable F493[or payment payable to] by the holder of an electricity account in respect of each electricity account which is certified by the distribution system operator as being a Medium-Large Account shall be calculated according to the following formula—

Where

A is the proportion of the F494[levy or payment attributable to] the category of Medium-Large Accounts in accordance with section 39(5A) expressed as a monetary amount;

B is the maximum import capacity of the electricity account of the final customer expressed in kVA;

C is the aggregate of the maximum import capacities of electricity accounts which are certified by the distribution system operator as Medium-Large Accounts expressed in kVA.

Construction and Interpretation

4. (a) In this Schedule a reference to the distribution system operator shall in the case of a final customer who has a direct connection to the transmission system be construed as including a reference to the transmission system operator.

(b) In this Schedule—

"formula determined by the Commission" means a formula determined by the Commission following consultation with the electricity industry, and having been approved by the Minister, which formula is, after such approval, published by the Commission;

"maximum import capacity" means in relation to an individual electricity account—

(i) the agreed maximum import capacity being the maximum import capacity expressed in kVA agreed by the holder of the electricity account with the distribution system operator, or

(ii) in a case where the maximum import capacity has not been agreed with such an operator, the deemed maximum import capacity being the level of maximum import capacity calculated by the distribution system operator (in accordance with a formula determined by the Commission) as being the maximum import capacity in relation to that account.]