4(1)In this paragraph—
(a)references to the contributor are to an individual liable to pay in respect of a contribution period an amount to another person by way of contribution to the amount he is liable to pay to an authority in respect of a collective community charge of the authority as it has effect for a financial year,
(b)references to the chargeable person are to the other person,
(c)references to the contribution are to the amount the individual is liable to pay, and
(d)the reference to the contribution period is to the contribution period concerned.
(2)Regulations under this Schedule may include provision—
(a)that the contributor is to make a payment or payments on account of the contribution, which may include a payment or payments before the contribution period ends,
(b)that payments must be made at prescribed times (which may be times determined by the chargeable person or times when rent or some other consideration for accommodation is due or otherwise),
(c)that in prescribed circumstances payments on account must be calculated by reference to an estimate of the contribution,
(d)that an estimate must be made on prescribed assumptions (whether as to a period of residence or otherwise),
(e)that the chargeable person must inform the contributor that the dwelling is a designated dwelling and supply him with prescribed information about the contribution and a receipt for any payment by way of the contribution, and
(f)that any amount paid by the contributor in excess of his liability (whether the excess arises because an estimate turns out to be wrong or otherwise) must be repaid.