Section 401.620 - Burden of proof(a) In a suspension or revocation hearing, the Director shall have the burden of establishing, by substantial evidence, the grounds for a suspension or revocation of a Certificate of Registration held by a pilot, as stated in the letter addressed to such pilot notifying him of the U.S. Coast Guard intention to suspend or revoke the pilot's registration.(b) In a refusal-to-renew-registration hearing, the Director shall have the burden of establishing the grounds for the Director's determination under § 401.240(c) to deny renewal of the Certificate of Registration.32 FR 14222, Oct. 13, 1967, as amended at 61 FR 5721, Feb. 14, 1996. Redesignated and amended at 61 FR 32655, June 25, 1996, and further redesignated and amended by USCG-1998-3976, 63 FR 35139, 35140, June 29, 1998