Nothing in this subsection (a)(9) shall be construed to prohibit an employer, employment agency or labor organization or any combination thereof from observing any provision of an employee pension benefit plan to the extent that such provision imposes, without regard to age, a limitation on the amount of benefits that the plan provides or a limitation on the number of years of service or years of participation which are taken into account for purposes of determining benefit accrual under the plan.
K.S.A. 44-1113