Except as otherwise specifically provided in section 26.1-12.2-03, from the date a plan of conversion is adopted by the governing body of a converting mutual company until three years after the effective date of the plan of conversion, a person may not directly or indirectly offer to acquire, make any announcement to acquire, or acquire in any manner, including making a filing with the insurance department for such acquisition under a statute or regulation of this state, the beneficial ownership of ten percent or more of a class of a voting security of the converted stock company or of a person that controls the voting securities of the converted stock company, unless the converted stock company or a person that controls the voting securities of the converted stock company consents to such acquisition and such acquisition is otherwise approved by the commissioner.