; and (2) of any amendment under subsection (b)(3) or (c)(3) not later than 90 days before the effective date of such amendment. (f) Enforcement (1) Penalties for late payment The Commission shall by rule prescribe a penalty for late payment of fees under this section. Such penalty shall be 25 percent of the amount of the fee that was not paid in a timely manner. (2) Interest on unpaid fees and penalties The Commission shall charge interest, at a rate determined under section 3717 of title 31, United States Code, on a fee or penalty under this section that is not paid in a timely manner. Such section 3717 shall not otherwise apply with respect to a fee or penalty under this section. (3) Dismissal of applications or filings The Commission may dismiss any application or other filing for failure to pay in a timely manner any fee, interest, or penalty under this section. (4) Revocations (A) In general In addition to or in lieu of the penalties and dismissals authorized by paragraphs (1) and (3), the Commission may revoke any instrument of authorization held by any licensee that has not paid in a timely manner a regulatory fee assessed under this section or any related interest or penalty. (B) Notice Revocation action may be taken by the Commission under this paragraph after notice of the Commission’s intent to take such action is sent to the licensee by registered mail, return receipt requested, at the licensee’s last known address. The notice shall provide the licensee at least 30 days to either pay the fee, interest, and any penalty or show cause why the fee, interest, or penalty does not apply to the licensee or should otherwise be waived or payment deferred. (C) Hearing (i) Generally not required A hearing is not required under this paragraph unless the licensee’s response presents a substantial and material question of fact. (ii) Evidence and burdens In any case where a hearing is conducted under this paragraph, the hearing shall be based on written evidence only, and the burden of proceeding with the