For the purpose of determining members entitled to notice of or to vote at any meeting of members, or in order to make a determination of members for any other proper purpose, the board of directors of a corporation 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 60 days and, for a meeting of members, not less than 5 days, or in the case of a merger, consolidation, dissolution or sale, lease or exchange of assets, not less than 20 days, immediately preceding such meeting. If 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 delivered shall be the record date for such determination of members. When a determination of members entitled to vote at any meeting of members has been made as provided in this Section, such determination shall apply to any adjournment thereof. In lieu of the board of directors from time to time establishing record dates, the bylaws of the corporation may establish a mechanism for determining record dates in all or specified instances.