(a) For the purpose of determining members entitled to notice of or to vote at any meeting of members or any adjournment thereof, or in order to make a determination of members for any other proper purpose, the board of directors of an electric membership corporation may provide that the membership books shall be closed for a stated period not to exceed 90 days.

(b) In lieu of closing the membership books, the bylaws or (in the absence of any applicable bylaws) the board of directors may fix in advance a date as the record date for any such determination of members, such date in any case to be not more than 90 days prior to the date on which the particular action requiring such determination of members is to be taken.

(c) If the membership books are not closed and no record date is fixed for the determination of members entitled to notice of or to vote at a meeting of members, the date on which notice of the meeting is mailed to all of the members shall be the record date for such determination of membership or, if such notice is not mailed to all of the members on the same date, the date ten days prior to the meeting shall be the record date for such determination of membership.

(d) When the determination of members entitled to vote at any meeting of the members has been made as provided in this Code section, such determination shall apply to any adjournment thereof unless the board of directors fixes a new record date under this Code section for the adjourned meeting.