From the bylaws:
“For a proposed amendment to be considered, it must include all specific language to be added, removed, or changed, have 20 cosponsors, and be submitted to the leadership committee not more than 90 days and not fewer than 30 days in advance of the annual convention. Amendments to these bylaws require a two-thirds vote and become effective on the first day of the next month following the annual convention, unless provided otherwise.”
That means submissions will be open until December 27th, 2018.
The full text of the current bylaws can be found on the bylaws page
Need some help drafting your amendment? Check the calendar for upcoming office hours!