39 C.F.R. § 3001.91 Applicability and general policy.
Title 39 - Postal Service
(a) The rules in this subpart identify those areas in which intervenors in rate and classification proceedings could assist the Commission. Intervenors are free to file any relevant and material evidence which is not unduly repetitious or cumulative. (b) Intervenors are invited to submit the information specified in §3001.92 (a) through (1) on a voluntary basis as part of their own direct cases. The Commission's request that intervenors voluntarily file such information is not in derogation of the Commission's and the presiding officer's authority, pursuant to §§3001.23 through 3001.28, respecting the provision of such or other information. Intervenors, particularly those making contentions under section 3622(b)(4) of the Act, shall be aware that their failure to provide relevant and material information will be taken into account in determining the weight which the Commission accords to their arguments and evidence. (c) All evidence shall be filed in accordance with §3001.31. The rules of general applicability of subpart A of this part are also applicable to filings subject to this subpart. [38 FR 7536, Mar. 22, 1973, as amended at 51 FR 8827, Mar. 14, 1986]
Title 39: Postal Service
PART 3001—RULES OF PRACTICE AND PROCEDURE
Subpart F—Rules Applicable to the Filing of Testimony by Intervenors
§ 3001.91 Applicability and general policy.

