(a) General rule. When the beginning of the workweek is changed, if the hours which fall within both “old” and “new” workweeks as explained in § 778.301 are hours in which the employee does no work, his statutory compensation for each workweek is, of course, determinable in precisely the same manner as it would be if no overlap existed. If, on the other hand, some of the employee's working time falls within hours which are included in both workweeks, the Department of Labor, as an enforcement policy, will assume that the overtime requirements of section 7 of the Act have been satisfied if computation is made as follows:

(b) Application of rule illustrated. Suppose that, in the example given in § 778.301, the employee, who receives $5 an hour and is subject to overtime pay after 40 hours a week, worked 5 hours on Sunday, March 7, 1965. Suppose also that his last “old” workweek commenced at 7 a.m. on Monday, March 1, and he worked 40 hours March 1 through March 5 so that for the workweek ending March 7 he would be owed straight time and overtime compensation for 45 hours. The proposal is to commence the “new” workweek at 7 a.m. on March 7. If in the “new” workweek of Sunday, March 7, through Saturday, March 13, the employee worked a total of 40 hours, including the 5 hours worked on Sunday, it is obvious that the allocation of the Sunday hours to the old workweek will result in higher total compensation to the employee for the 13-day period. He should, therefore, be paid $237.50 (40 × $5 + 5 × $7.50) for the period of March 1 through March 7, and $175 (35 × $5) for the period of March 8 through March 13.

(c) Nonstatutory obligations unaffected. The fact that this method of compensation is permissible under the Fair Labor Standards Act when the beginning of the workweek is changed will not alter any obligation the employer may have under his employment contract to pay a greater amount of overtime compensation for the period in question.