1. Except where, in the case of a worker partly employed in agriculture, different provision is made by a relevant agreement—
(a)for the purposes of regulation 13, the leave year of a worker employed in agriculture begins on 6th April each year or such other date as may be specified in an agricultural wages order which applies to him; and
(b)the dates on which leave is taken by a worker employed in agriculture shall be determined in accordance with an agricultural wages order which applies to him.