(a) On and after January 1, 1978, no employer shall employ any employee for a workweek longer than 46 hours, unless such employee receives compensation for employment in excess of 46 hours in a workweek at a rate of not less than 11/2 times the hourly wage rate at which such employee is regularly employed.

(b) No employer shall be deemed to have violated subsection (a) with respect to the employment of any employee who is covered by this section, who is engaged in the public or private delivery of emergency medical services as an emergency medical service provider as defined by Kan. Stat. Ann. § 65-6112, and amendments thereto, or who is engaged in fire protection or law enforcement activities, including any member of the security personnel in any correctional institution, and who is paid compensation at a rate of not less than 11/2 times the regular rate at which such employee is employed:

(1) In any work period of 28 consecutive days in which such employee works for tours of duty that in the aggregate exceed 258 hours; or

(2) in the case of any such employee to whom a work period of at least seven but less than 28 days applies, in any such work period in which such employee works for tours of duty that in the aggregate exceed a number of hours that bear the same ratio to the number of consecutive days in such work period as 258 hours bears to 28 days.

(c) The provisions of this section shall not apply to the employment of:

(1) Any employee who is covered under the provisions of section 7 of the fair labor standards act of 1938 as amended, 29 U.S.C.A. § 207, and as amended by the fair labor standards amendments of 1974, and amendments thereto; or

(2) any employee who is primarily engaged in selling motor vehicles, as defined in Kan. Stat. Ann. § 8-126, and amendments thereto, for a non-manufacturing employer primarily engaged in the business of selling such vehicles to ultimate purchasers;

(3) any person who is sentenced to the custody of the secretary of corrections and any person serving a sentence in a county jail.

(d) For the purposes of this section, the agreement or practice by employees engaged in fire protection or law enforcement activities of substituting for one another on regularly scheduled tours of duty, or a part thereof, shall be deemed to have no effect on hours of work if:

(1) The substituting is done voluntarily by the employees and not at the behest of the employer;

(2) the reason for substituting is due not to the employer’s business practice but to the employee’s desire or need to attend to a personal matter;

(3) a record is maintained by the employer of all time substituted by the employer’s employees; and

(4) the period during which time is substituted and paid back does not exceed 12 months.