[Code of Federal Regulations] [Title 24, Volume 1] [Revised as of April 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 24CFR180.505] [Page 741] TITLE 24--HOUSING AND URBAN DEVELOPMENT CHAPTER I--OFFICE OF ASSISTANT SECRETARY FOR EQUAL OPPORTUNITY, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT PART 180_CONSOLIDATED HUD HEARING PROCEDURES FOR CIVIL RIGHTS MATTERS --Table of Contents Subpart E_Discovery Sec. 180.505 Supplementation of responses. A party is under a duty, in a timely fashion, to: (a) Supplement a response with respect to any question directly addressed to: (1) The identity and location of persons having knowledge of discoverable matters; and (2) The identity of each person expected to be called as an expert witness, the subject matter on which the expert witness is expected to testify, and the substance of the testimony. (b) Amend a response if the party later obtains information upon the basis of which: (1) The party knows the response was incorrect when made, or (2) The party knows the response, though correct when made, is no longer true, and the circumstances are such that a failure to amend the response is, in substance, a knowing concealment. (c) Supplement other responses, as imposed by order of the ALJ or by agreement of the parties.