Updated NSF Proposal and Award Policies & Procedures Guide Proposal submissions on or after May 20, 2024 January 26, 2024 NSF issued a revised version of the Proposal & Award Policies & Procedures Guide (PAPPG) which will be effective for proposals submitted or due on or after May 20, 2024. Refer to the OSP Blog for more information. NSF will present information about these changes in a webinar on March 12th at 2:00 PM (EST).