During Convention year Your Resolution must be submitted at least 60 days prior to Convention. In 2013, that means that resolutions must be received at the NSGEU Head Office by March 8th.
You should give yourself plenty of time to write and take your idea to your Local. So you should start to think about your idea in January. This should give you enough time to have your Local approved resolution or amendment submitted and received by the NSGEU Head Office.