(1)The total amount payable to an employee in respect of any debt to which this Part applies, where the amount of the debt is referable to a period of time, shall not exceed—
(a)[F919 £751F919] in respect of any one week, or
(b)in respect of a shorter period, an amount bearing the same proportion to [F920£751F920] as that shorter period bears to a week.
F921 (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .