Overtime equal to twice (2) the normal wage is paid for hours greater than 12 hours, on a working day or on Sundays or public holidays. Overtime of twice (2) of the regular wage is paid for all work of more than fifty (50) hours during a regular work week. United Roofing Contractors Association of San Diego County and United Union of Roofers, Waterproofers and Allied Workers, Local #45 (2009) There are three categories of subjects that are part of a CBA: compulsory, voluntary or free and illegal subjects. Compulsory subjects are the subjects prescribed by law and the National Labor Relations Board (NLRB). These issues include issues such as wages, overtime, bonuses, complaint procedures, safety and work practices and seniority, as well as dismissal, dismissal, recall or discipline procedures. Since there are cases where a person is late for legitimate reasons, this program provides a flexible and fair policy that should not affect conscientious staff. For the purposes of this Directive, delay is defined as a declaration at work five minutes after the prescribed departure time, whether at the beginning of the working day, after lunch or after breaks. In addition, the usual delay is defined as four or more times of delay in a calendar month. Trenton, City and American Federation of State, County & Municipal Employees (AFSCME), AFL-CIO, Local 2286 (2002) Overtime is voluntary, except in an emergency or when the necessary staff is not available on a voluntary basis. There must be no discrimination against workers who refuse to work overtime voluntarily.