Mont. Code Ann. § 33-1-401

33-1-401 . Examination of insurers. (1) The commissioner shall examine the affairs, transactions, accounts, records, and assets of each authorized insurer as often as the commissioner considers advisable. The commissioner shall examine each authorized insurer not less frequently than every 5 years.

(2) The commissioner shall in like manner examine each insurer applying for an initial certificate of authority to do business in this state.

(3) In lieu of making an examination under this part of any foreign or alien insurer licensed in this state, the commissioner may accept an examination report on the company prepared by the insurance department for the company's state of domicile or port-of-entry state until January 1, 1994. After January 1, 1994, the reports may only be accepted if:

(a) the insurance department was at the time of the examination accredited under the national association of insurance commissioners' financial regulation standards and accreditation program; or

(b) the examination is performed under the supervision of an accredited state insurance department or with the participation of one or more examiners who are employed by such an accredited state insurance department and who, after a review of the examination workpapers and report, state under oath that the examination was performed in a manner consistent with the standards and procedures required by their insurance department.

(4) For purposes of completing an examination of any company under this part, the commissioner may examine or investigate any person or the business of any person, insofar as the examination or investigation is, in the sole discretion of the commissioner, necessary or material to the examination of the company.