There’s a new version of the Proposal & Award Policies & Procedures Guide, or PAPPG (NSF 19-1). Check out a summary of the significant changes from prior versions and clarifications found in the new PAPPG here: https://www.nsf.gov/pubs/policydocs/pappg19_1/sigchanges.jsp
For international collaborations, please note the Cover Page has a new box to check for any international subawards and consultancies.
The guidelines in NSF 19-1 apply for proposals submitted or due, or awards made, on or after February 25, 2019. For instance, starting today (March 4, 2019) any RAPID or EAGER proposals intended for DEB would list the NSF 19-1 PAPPG program announcement number on the proposal cover page.
The PAPPG contains the full set of general guidelines to PIs, and includes everything from proposal preparation to award reporting and close-out. Many program-specific solicitations will reference the PAPPG for instructions on proposal submission, so it’s a good idea to familiarize yourself with this document and make sure that your Sponsored Projects Office is aware of this new version.