Where (in accordance with section 13) the employer of a worker in retail employment makes, on account of one or more cash shortages or stock deficiencies, a deduction or deductions from wages payable to the worker on a pay day, the amount or aggregate amount of the deduction or deductions shall not exceed one-tenth of the gross amount of the wages payable to the worker on that day.
Where the employer of a worker in retail employment makes a deduction from the worker's wages on account of a cash shortage or stock deficiency, the employer shall not be treated as making the deduction in accordance with section 13 unless (in addition to the requirements of that section being satisfied with respect to the deduction)—
not later than the end of the relevant period.
In subsection (2) "the relevant period" means the period of twelve months beginning with the date when the employer established the existence of the shortage or deficiency or (if earlier) the date when he ought reasonably to have done so.