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

It is an unlawful discriminatory practice for an educational institution that operates, sponsors, or facilitates athletic programs or activities to permit a person whose sex is male to participate in an athletic program or activity that is designated for females.

Discrimination in employment. (1) It is an unlawful discriminatory practice for: (ii) for refusal to attend any training outside of the scope of employment that promotes a controversial social vision [...] "Controversial social vision" means any agenda, concept, or theory that promotes concepts, ideas, or issues that are not broadly accepted in society or that generate strong opposition by mainstream political, religious, or social groups with the various facts or theories being in dispute.

The state may not penalize or take an adverse action against a person because the person declines to: (a) identify the person's pronouns; or (b) address another person by using a name other than the other person's legal name or a derivative of the other person's legal name or by using a pronoun or a title that is inconsistent with the other person's sex.

A person commits the offense of indecent exposure in a public place when the person knowingly or purposely exposes their genitals or intimate parts to members of the opposite biological sex or opposite the person's assigned sex at birth.

A school may not allow a child to attend identity instruction unless the child's parent or guardian agrees in writing to allow the child to attend. [...] A child is excused from participating in identity instruction unless the child fails to attend after the parent or guardian has agreed in writing to allow the child's attendance.

The 69th Legislature of the State of Montana believes biological boys and men should not be allowed to play girls' and women's sports.

A person, whether or not the person is supervising the welfare of the child, commits the offense of endangering the welfare of children if the person knowingly procures or provides any of the following treatments on a child less than 16 years of age for the purpose of altering the appearance of the child or affirming the child's perception of the child's sex when the appearance or perception is inconsistent with the child's biological sex: (a) surgical procedures; (b) puberty blockers or other synthetic drugs that suppress the production of hormones to delay or suppress pubertal development; or (c) supraphysiologic doses of estrogen or testosterone or other androgens.

A health care professional or physician may be found liable under subsection (1) for an injury caused by the following treatments or the after-effects of the following treatments provided to a male patient to address the patient's perception that the patient's gender or sex is not male: (i) surgical procedures, including a penectomy, orchiectomy, vaginoplasty, clitoroplasty, vulvoplasty, augmentation mammoplasty, facial feminization surgery, voice surgery, thyroid cartilage reduction, or gluteal augmentation; (ii) supraphysiologic doses of estrogen; or (iii) puberty blockers such as GnRH agonists or other synthetic drugs that suppress the production of testosterone or delay or suppress pubertal development in male minors. (5) The medical treatments listed in subsections (4)(a) and (4)(b) may be the basis of a claim under subsection (1) only when knowingly provided to address a female patient's perception that the patient's gender or sex is not female or a male patient's perception that the patient's gender or sex is not male.

A financial institution may not: (a) discriminate in the provision of financial services to a person [...] "Discriminate in the provision of financial services" means utilizing a social credit score to directly or indirectly decline to provide full and equal enjoyment in the provision of financial services, including refusing to provide, terminating, or restricting financial services. [...] "Social credit score" means any analysis, rating, scoring, list, or tabulation that evaluates any of the following: [...] (D) failure or refusal to conduct any type of racial, diversity, or gender audit or disclosure or to provide any sort of quota, preference, or benefit based, in whole or in part, on race, diversity, or gender;

The board of trustees of a school district shall develop and adopt a policy to ensure that parents have full access to information relating to their children who are enrolled in the school district, including: (a) requirements that a district employee may not withhold or conceal information from or facilitate, encourage, or coerce a child to withhold or conceal information from the child's parents about the child's: [...] (iv) purported gender identity or requests to be treated as the opposite sex;