Montana Title 49. Human Rights § 49-3-103. Permitted distinctions

(a) from enforcing a differentiation based on marital status, age, or physical or mental disability when based on a bona fide occupational qualification reasonably necessary to the normal operation of the particular business or where the differentiation is based on reasonable factors other than age;

(b) from observing the terms of a bona fide seniority system or any bona fide employee benefit plan, such as a retirement, pension, or insurance plan, that is not a subterfuge to evade the purposes of this chapter, except that an employee benefit plan may not excuse the failure to hire any individual;

(c) from discharging or otherwise disciplining an individual for good cause; or

(d) from providing greater or additional contributions to a bona fide group insurance plan for employees with dependents than to those employees without dependents or with fewer dependents.