49 CFR § 1104.4 - Attestation and verification.
(a)Signature of attorney or practitioner. If a party is represented by a practitioner or an attorney, the original of each paper filed should be signed in ink by the practitioner or attorney, whose address should be stated. The signature of a practitioner or attorney constitutes a certification that the representative:
(1) Has read the pleading, document or paper;
(2) Is authorized to file it;
(3) Believes that there is good ground for the document;
(4) Has not interposed the document for delay;
(b)Signature by one not authorized to represent others before the Board. The original of each document not signed by a practitioner or attorney must be:
(1) Signed in ink;
(2) Accompanied by the signer's address; and
(3) Verified, if it contains allegations of fact, under oath by the person, in whose behalf it is filed, or by a duly authorized officer of the corporation in whose behalf it is filed. If the pleading is a complaint, at least one complainant must sign and verify the pleading.