Freemasonry traditionally being a Fraternity of good men, no person shall become or remain a Mason who does not continue to remain both physically and legally a male or who does not continue to present and conduct himself as such.The petition for membership now requires members to avow that they were born a male and continue as a male.
To my knowledge, this is the first time a U.S. Grand Lodge has dealt with the issue of transgendered members. Somebody correct me if I'm wrong.
Read the whole edict here.
See also the blog entry by Jason Richards.
H/T Bill Hosler