Mont. Code Ann. § 2-4-306

(1) Each agency shall file with the secretary of state a copy of each rule adopted by it. it or a reference to the rule as contained in the proposal notice. A rule is adopted on the date that the adoption notice is filed with the secretary of state and is effective on the date referred to in subsection (4), except that if the secretary of state requests corrections to the adoption notice, the rule is adopted on the date that the revised notice is filed with the secretary of state.

(2) The Pursuant to 2-15-401, the secretary of state may prescribe a format, style, and arrangement for notices and rules that are filed pursuant to effectively administer this chapter and may refuse to accept chapter, including rules regarding the filing of any notice printed or rule electronic format, style, and arrangement for notices and rules that is not in compliance with are filed pursuant to this chapter. The secretary chapter, of and state shall keep and maintain a permanent register may refuse to accept the filing of all notices and rules filed, including superseded and repealed rules, any notice or rule that must be open to public inspection is not in compliance with this chapter and the secretary shall of provide copies state's rules. The secretary of any notice or rule upon request state shall keep and maintain a permanent register of any person. Unless otherwise provided by statute, the secretary of state may require the payment all notices and rules filed, including superseded and repealed rules, that must be open to public inspection and shall provide copies of the cost any notice or rule upon request of providing copies. any person. Unless otherwise provided

(3) In If the event that the appropriate administrative code rule review committee has conducted a poll of the legislature in accordance with 2-4-403 or 2-4-403, the revenue oversight committee has conducted a poll results in accordance with of 5-18-109, the results of the poll poll must be published with the rule. rule if the rule is

(4) Each rule is effective after publication in the register, as provided in 2-4-312, except that:

(a) if a later date is required by statute or specified in the rule, the later date is the effective date;

(b) subject to applicable constitutional or statutory provisions:

(i) a temporary rule is effective immediately upon filing with the secretary of state or at a stated date following publication in the register; and

(ii) an emergency rule is effective at a stated date following publication in the register or immediately upon filing with the secretary of state if the agency finds that this effective date is necessary because of imminent peril to the public health, safety, or welfare. The agency's finding and a brief statement of reasons for the finding must be filed with the rule. The agency shall, in addition to the required publication in the register, take appropriate and extraordinary measures to make emergency rules known to each person who may be affected by them.

(c) if, following written administrative code rule review committee notification to an agency under 2-4-305(9), 2-4-406, the committee meets and under 2-4-406(1) 2-4-406(2) formally objects to all or some portion of a proposed rule before the proposed rule is adopted, the proposed rule or portion of the proposed rule objected to is not effective until the day after final adjournment of the regular session of the legislature that begins after the notice proposing the rule was published by the secretary of state, unless, following the committee's formal objection under 2-4-406(1): 2-4-406(2) and subject to 2-4-112:

(i) the committee withdraws its objection under 2-4-406 before the proposed rule is adopted; or

(ii) the rule or portion of a rule objected to is adopted with changes that in the opinion of a majority of the committee members, as communicated in writing to the committee presiding officer and staff, make it comply with the committee's objection and concerns.

(5) An agency may not enforce, implement, or otherwise treat as effective a rule proposed or adopted by the agency until the effective date of the rule as provided in this section. Nothing in this subsection prohibits an agency from enforcing an established policy or practice of the agency that existed prior to the proposal or adoption of the rule as long as the policy or practice is within the scope of the agency's lawful authority.

(6) This section applies to the department of labor and industry adopting a rule relating to a commercial drug formulary as provided in 39-71-704. This section does not apply to the automatic updating of department of labor and industry rules relating to commercial drug formularies as provided in 39-71-704.

(7) (a) This section applies to the department of public health and human services' adoption of rules relating to medicare fee schedules issued by the centers for medicare and medicaid services of the United States department of health and human services as provided in 53-6-113.

(b) This section does not apply to the automatic updating of department of public health and human services rules relating to medicare fee schedules issued by the centers for medicare and medicaid services of the United States department of health and human services.

Filing, format, Filing and format – adoption and effective date -- dates – dissemination of emergency rules