[Code of Federal Regulations] [Title 21, Volume 9] [Revised as of April 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR1404.425] [Page 243] TITLE 21-FOOD AND DRUGS CHAPTER III--OFFICE OF NATIONAL DRUG CONTROL POLICY PART 1404_GOVERNMENTWIDE DEBARMENT AND SUSPENSION (NONPROCUREMENT)--Table of Contents Subpart D_Responsibilities of Office of National Drug Control Policy Officials Regarding Transactions Sec. 1404.425 When do I check to see if a person is excluded or disqualified? As an agency official, you must check to see if a person is excluded or disqualified before you-- (a) Enter into a primary tier covered transaction; (b) Approve a principal in a primary tier covered transaction; (c) Approve a lower tier participant if agency approval of the lower tier participant is required; or (d) Approve a principal in connection with a lower tier transaction if agency approval of the principal is required.