5.—(1) Where a renter meets the payment condition, liability condition and occupation condition in respect of one or more descriptions of relevant payment, each such description is to be taken into account for the purposes of the calculation under Part 4 or 5 of this Schedule.
(2) No account is to be taken of any amount of a relevant payment to the extent that all of the conditions referred to in sub-paragraph (1) are not met in respect of that amount.
(3) Any particular payment for which a renter is liable is not to be brought into account more than once whether in relation to the same or a different renter (but this does not prevent different payments of the same description being brought into account in respect of an assessment period).