That the regular meetings of the board of trustees shall be held on the first Monday of each alternate month. Special meetings may be held at any time on the call of the president of the board. A majority of the board shall constitute a quorum for the transaction of business, save as hereinbefore provided. All vacancies in the board shall be filed [filled] by the remaining qualified members thereof, the persons appointed to fill such vacancies to hold their offices until the election and qualification of their successors. All expenses for holding elections under the provisions of this article, and all expenses necessary and proper incurred in the exercise of the powers herein conferred may be paid by the board of trustees out of the funds belonging to the corporation.