(1) A savings bank together with its subsidiaries, service entities, and entities the controlling interests of which are more than 50% owned by subsidiaries or service entities or association service corporations, are subject to examination of the commissioner, with or without prior notice, not less frequently than once every 18 months concerning the conditions and affairs of the savings bank. The commissioner shall also examine a savings bank under the commissioner’s jurisdiction when requested by its board of directors. In connection with an examination, the commissioner, or the commissioner’s authorized agent, may examine on oath a director, officer, agent, employee, or shareholder of a savings bank concerning the affairs and business of the savings bank. The commissioner shall ascertain whether the savings bank transacts its business in the manner prescribed by law and the rules promulgated pursuant to law. The commissioner, or the commissioner’s authorized agent, may make an examination of an affiliate, subsidiary, or service entity necessary to disclose fully the relationship between a savings bank and the affiliate, subsidiary, or service entity and the effect of the relationship upon the savings bank.

  (2) The commissioner may examine the branch or branches located in this state of an out-of-state bank under the federal deposit insurance act, chapter 967, 64 Stat. 873.

  (3) In fulfilling the requirements of subsections (1) and (2), the commissioner may use an examination made under the federal deposit insurance act, or the law of another state governing the activities of out-of-state banks in that state. The commissioner may require the savings bank to furnish a copy of any report required by a federal or state bank regulatory agency.

  (4) An examination required by this section shall include the fiduciary activities of the savings bank.

  (5) The commissioner may contract with other savings bank regulatory agencies to assist in the conduct of examinations of savings banks with 1 or more branches located in other states and in examination of out-of-state banks with 1 or more branches located in this state.