21(1)This paragraph applies where—
(a)a contract is made, or an expense is incurred, in connection with the referendum, and
(b)the contract or expense is in contravention of a relevant provision.
(2)In this paragraph a “relevant provision” means a provision of Part 7 of the 2000 Act which prohibits—
(a)payments or contracts for payments,
(b)the payment or incurring of referendum expenses in excess of the maximum amount allowed by that Part, or
(c)the incurring of referendum expenses without the authority mentioned in section 113(1) of the 2000 Act.
(3)Nothing in any such provision affects the right of a creditor who, when the contract was made or the expense was incurred, was ignorant of the fact that the contract or expense was in contravention of the relevant provision.