376.100.  Mutual companies — contents of charter. — When such corporators propose to form a mutual company, for the purpose designated in section 376.010, the charter comprised in the declaration mentioned in section 376.050 shall set forth:

  (1)  The name assumed by such corporation, and by which it shall be known;

  (2)  The place where the principal office for the transaction of its business shall be located;

  (3)  The specific kind or kinds of business which it proposes to transact;

  (4)  The number of persons from whom proposals for assurance shall be received, the amount of premiums to be received on deposit, and the amount of cash to be paid on the same, before the company shall begin to do business and issue policies;

  (5)  The manner in which the corporate powers granted by sections 376.010 to 376.670 are to be exercised, showing the number of directors, which shall not be more than twenty-one nor less than nine, their powers and duties, the manner of their election, the mode of filling vacancies, and such other particulars as may be necessary to make manifest the objects and purposes of the association, and the manner in which it is to be conducted.