The Sponsored Projects Office has provided guidance for the Berkeley campus on Furlough Exchange Program (FEP) charges to grants and contracts.
Full-time faculty in a Professorial or Lecturer Security of Employment title series who are Principal Investigators and are subject to the Furlough/Salary Reduction Program may choose to participate in the FEP. Under the FEP, a PI may charge one or more externally funded projects for time and effort equivalent to the percent of their furloughed time if this will contribute to the success of the project/s.
See the the SPO guidance for detailed information, links to UCOP memoranda and the UCOP Q&A for contract and grant officers, and additional clarification from NSF.