(1) For regulation 20A(1)(a) of the Principal Regulations substitute —
"(a) for each class of access licence prescribed in regulation 17(1)(a), (b) and (c), a levy calculated in accordance with the following formula—
".
(2) For regulation 20A(1)(c) of the Principal Regulations substitute —
"(c) for each class of individual quota unit prescribed in regulation 20(1)(a), (b) and (c), a levy calculated in accordance with the following formula—
".