[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: 45CFR620.435] [Page 171] TITLE 45--PUBLIC WELFARE CHAPTER VI--NATIONAL SCIENCE FOUNDATION PART 620_GOVERNMENTWIDE DEBARMENT AND SUSPENSION (NONPROCUREMENT) --Table of Contents Subpart D_Responsibilities of National Science Foundation Officials Regarding Transactions Sec. 620.435 What must I require of a primary tier participant? You as an agency official must require each participant in a primary tier covered transaction to-- (a) Comply with subpart C of this part as a condition of participation in the transaction; and (b) Communicate the requirement to comply with Subpart C of this part to persons at the next lower tier with whom the primary tier participant enters into covered transactions.