[Code of Federal Regulations] [Title 45, Volume 3] [Revised as of October 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 45CFR620.300] [Page 168] TITLE 45--PUBLIC WELFARE CHAPTER VI--NATIONAL SCIENCE FOUNDATION PART 620_GOVERNMENTWIDE DEBARMENT AND SUSPENSION (NONPROCUREMENT) --Table of Contents Subpart C_Responsibilities of Participants Regarding Transactions Sec. 620.300 What must I do before I enter into a covered transaction with another person at the next lower tier? Doing Business With Other Persons When you enter into a covered transaction with another person at the next lower tier, you must verify that the person with whom you intend to do business is not excluded or disqualified. You do this by: (a) Checking the EPLS; or (b) Collecting a certification from that person if allowed by this rule; or (c) Adding a clause or condition to the covered transaction with that person.