Montana HB121

(1) A covered entity shall designate each multi-occupancy restroom, changing room, or sleeping quarters for the exclusive use of females or males.

(2) A restroom, changing room, or sleeping quarters within a covered entity that is designated for females or males may be used only by members of that sex.

"Sex" means the organization of the body parts and gametes for reproduction in human beings and other organisms. In human beings, there are exactly two sexes, male and female, with two corresponding types of gametes. The sexes are determined by the biological and genetic indication of male or female, including sex chromosomes, naturally occurring sex chromosomes, gonads, and nonambiguous internal and external genitalia present at birth, without regard to an individual's psychological, behavioral, social, chosen, or subjective experience of gender.