2.—(1) Where a plan fee is payable in respect of the erection of one or more small domestic buildings shown on the deposited plans the plan fee payable for that building or those buildings is the total of the sums calculated by reference to Tables 1 and 2; or
(2) Where a plan fee is payable in respect of the erection of a dwelling or dwellings shown on the deposited plans and for which a type approval certificate has been given the plan fee payable for that dwelling or dwellings is 50% of the total of the sums calculated by reference to Tables 1 and 2.