Effective in mid-2012, the Geography and Spatial Sciences (GSS) Program will conduct one annual competition for new research proposals submitted to the program. The next deadline for submission of regular research proposals for this competition will be Thursday, September 13, 2012. In future years, the proposal-submission deadline will be the 1st Thursday of September. Based on the evaluation of proposals in that one annual competition, some investigators may be invited to revise and resubmit proposals for a follow-up competition, but that will be limited to proposals whose principal investigators received explicit invitations to resubmit from the GSS program officers. Details are provided in the "Timing of Proposal Submission and Evaluation" section below.