The RPPR is used by recipients to submit progress reports to NIST on their grant awards and cooperative agreements. The RPPR instructions provide guidance on the data elements and information required of the report. Recipients should refer to the individual award terms and special award conditions (SACs) to determine if the RPPR is the required format for submitting progress reports to NIST. Further, the award terms and SACs will specify the frequency at which progress reports are due and the specific sections/data elements required in each RPPR submission.