Question: What is a Regulation Identifier Number (RIN)?

Answer:

A RIN, or "Regulation Identifier Number," is assigned by the Office of Management and Budget's (OMB) electronic docketing system to identify each regulatory action listed in the Unified or Regulatory Agenda. OMB has asked agencies to include RINs in the headings of their Rule and Proposed Rule documents when publishing them in the Federal Register, to make it easier for the public and agency officials to track the publication history of regulatory actions throughout their development.