Section 1. Regular meetings shall be held quarterly on the first Monday in January, April, July, and October. The annual business meeting shall be held on the first Monday in October. The annual business meeting shall be held on the first Monday in October.
Yes, that sentence is in there twice. SC
      Section 2. Special meetings may be called by the president.
      Section 3. The board of directors shall meet every other month.
      Section 4. Ten per cent (10%) of the members shall constitute a quorum.

      Section 1. The president shall preside at meetings, report annually on the activities of the society, and appoint committees. The president shall have the power to call special meetings.
Redundant with II.2. SC
      Section 2. The vice-president shall assume the duties of the president in the event of ansence, incapacity, or resignation. The vice-president shall be the chairman of the program committee. The vice-president shall be president elect.
      Section 3. The secretary shall keep the minutes of the meetings, maintain a list of members, and attend to correspondence.
      Section 4. The treasurer shall be responsible for the safekeeping of society funds in a reliable bank, paying authorized bills, and collecting dues. The treasurer shall render an annual report.
      Section 5. The board of directors shall have the power to conduct all affairs of the society pursuant to the constitution. At any meeting of the executive committee, four members shall constitute a quorum. The board of directors will elect its own chairman. The board of directors, through the chairman, shall render an annual report at each annual meeting.
Nowhere is the Board of Directors defined. SC

      The annual meeting of the society shall be held the first Monday in October.
Again, doubly stated in II.1. SC

      Section 1. The officers shall be a president, a vice-president, a secretary, and a treasurer, who shall be elected for a term of one year; and three directors, who shall be elected for a term of three years.
      Section 2. The officers and directors shall constitute the executive committee.
Should be defined before stating their duties. Could/should be in same article as duties: Definitions, Duties, Elections. SC

      Section 1. All officers and directors shall be elected by a plurality of votes cast by secret ballot at the annual meeting.
      Section 2. Nominations shall be made by a committee appointed by the president. After the nominating committee has presented its selections nominations will be accepted from the floor.
      Section 3. A person who has been elected to the board of directors for two consecutive terms shall not be nominated to the same office unless one year elapses between the end of his last term and the beginning of the term for which he is nominated.
      Section 4. Officers and directors shall be installed at the close of the annual meeting at which they were elected and shall serve until their successors have been duly elected and installed. In the event of resignation or incapicity [SP] of any officer except the president, or any director, the vacancy may be filled by a vote of the executive committee for the unexpired term of office.

      This constitution may be amended at any regular or adjourned meeting by a two-thirds vote of those voting, provided notice was given at the previous meeting. Or it may be amended at a special meeting called for that purpose, with previous notice and a two-thirds vote. All proposed amendments shall be submitted in writing.
What is this: Constitution or Bylaws? Title says 'Bylaws'. SC