Any association may, by resolution adopted by a majority vote of its members or stockholders present or represented by proxy and entitled to vote at any annual meeting or any special meeting called for the purpose, amend its charter or bylaws in any manner not inconsistent with the provisions of the Savings and Loan Act. Before the amendments become effective, they shall be filed with, and approved by, the supervisor. A copy of any amendments to the charter shall be filed with the state corporation commission [public regulation commission].