(a)The statutory provision. Section 7(j) of the Act provides, for hospital and residential care establishment employment, under prescribed conditions, an exemption from the general requirement of section 7(a) that overtime compensation be computed on a workweek basis. It permits a 14-day period to be established for the purpose of computing overtime compensation by an agreement or understanding between an employer engaged in the operation of a hospital or residential care establishment, and any of his employees employed in connection therewith. The exemption provided by section 7(j) applies: if, pursuant to an agreement or understanding arrived at between the employer and employee before performance of the work, a work period of 14 consecutive days is accepted in lieu of the workweek of 7 consecutive days for purposes of overtime computation and if, for his employment in excess of 8 hours in any workday and in excess of 80 hours in such 14-day period, the employee receives compensation at a rate not less than one and one-half times the regular rate at which he is employed.