FAR Part 15 has not yet been overhauled under the Revolutionary FAR Overhaul. The current eCFR text is operative.
Clauses in Part 52.15xx
52.215-18 Reversion or Adjustment of Plans for Postretirement Benefits (PRB) Other Than Pensions.
52.215-20 Requirements for Certified Cost or Pricing Data and Data Other Than Certified Cost or Pricing Data.
52.215-21 Requirements for Certified Cost or Pricing Data and Data Other Than Certified Cost or Pricing Data—Modifications.
eCFR
Current regulatory text for FAR Part 15.
View on eCFR
RFO FAQs
Frequently asked questions about the FAR Overhaul.
View on acquisition.gov