A wage employee whose regular work schedule includes an 8-hour period of service which is not overtime work, a part of which is on Sunday, is entitled to additional pay under the provisions of  section 5544 of title 5, United States Code.
    
    
        
            Code of Federal Regulations
        
        [46 FR 21344, Apr. 10, 1981, as amended by 58 FR 3201, Jan. 8, 1993]