3(1)Where any sum which is payable or calculated otherwise than as a weekly amount falls to be taken into account for the purposes of this Schedule, it shall be converted into the weekly amount which represents it, and that amount shall be treated as the relevant amount for those purposes ; and accordingly in this Schedule references to " weekly rent " and " weekly income " are references to the amount which represents the rent or the income as so converted.
(2)Where an authority for administrative convenience arrange for the year's rent to be paid irregularly, or so that no rent is payable for or collected in certain periods, or so that rent for different periods in the year is of different amounts, the provisions of this Schedule shall be applied, and all calculations shall be made, by reference to the rent which would have been paid if the arrangements had not been made.