In the case of the staff mentioned in article L. 2512-1 who are not subject to the provisions of article 1 of law no. 82-889 of 19 October 1982, the absence of service as a result of a concerted cessation of work entails, for each day, a deduction from salary or wages and supplements other than family allowances. Deductions are made on the basis of the periods of absence defined in article 2 of the aforementioned law.