[Code of Federal Regulations]
[Title 49, Volume 5]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR386.40]

[Page 269]
 
                        TITLE 49--TRANSPORTATION
 
                      DEPARTMENT OF TRANSPORTATION
 
PART 386_RULES OF PRACTICE FOR MOTOR CARRIER, BROKER, FREIGHT FORWARDER, 
AND HAZARDOUS MATERIALS PROCEEDINGS--Table of Contents
 
                  Subpart D_General Rules and Hearings
 
Sec.  386.40  Supplementation of responses.

    A party who has responded to a request for discovery with a response 
that was complete when made is under no duty to supplement his/her 
response to include information thereafter acquired, except as follows:
    (a) A party is under a duty to supplement timely his/her 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 at the hearing, the subject matter on which he or she is 
expected to testify and the substance of his or her testimony.
    (b) A party is under a duty to amend timely a prior response if he 
or she later obtains information upon the basis of which:
    (1) he or she knows the response was incorrect when made; or
    (2) he or she knows that 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) A duty to supplement responses may be imposed by order of the 
Assistant Administrator or the administrative law judge or agreement of 
the parties.