This ballot requires a Special Majority Vote [2]. The TC roster currently lists 4 voting members. In order to pass, at least 3 members have to vote Yes and none may vote No.
[1] URI for the specification
http://docs.oasis-open.org/docbook/docbook/v5.1/csprd02/docbook-v5.1-csprd02.html
[2] http://www.oasis-open.org/committees/process-2010-07-28.php#dSpecialMajority |