Section 10. The by-laws may be amended at any annual meeting, or at a special meeting called for the purpose, by a majority vote of all of the members present and entitled to vote; provided, however, that the notice of the meeting and of the proposed amendment is given each member in the manner prescribed in said by-laws. No amendment or amendments containing a change in the conditions of residence, occupation or association which qualify persons for membership, or change in location, or change in name shall become operative until approved in writing by the commissioner.