6. (1) A contract to which this Act applies is a prescribed contract if the total consideration payable by the consumer under, or in respect of, the contract—
(a) is not ascertainable at the time of the making of the contract; or
(b) is ascertainable at the time of the making of the contract and exceeds $50, or if another amount is prescribed, that amount.
(2) Where—
(a) 2 or more contracts relate substantially to the same transaction; and
(b) the transaction could have been effected by a single contract which would in that case, have constituted a prescribed contract;
then each of the contracts that would not, if it stood alone, constitute a prescribed contract becomes a prescribed contract and, for the purpose of ascertaining the cooling-off period in relation to such a contract, it shall be deemed to have been made when the last of the contracts was made.
(3) The following are not prescribed contracts:
(a) a contract of insurance;
(b) a contract solely for the provision of credit;
(c) a contract for the supply of goods or services by a charitable organisation;
(d) a contract of a kind declared by the regulations not to be a prescribed contract.
(4) In proceedings in which it is alleged that a contract for the supply of goods or services is a prescribed contract, the contract shall be presumed to be such a contract in the absence of proof to the contrary.
(5) In subsection (3)—