; and (ii) the licensee has not corrected the violation. (4) The Attorney General may not bring an enforcement action on the basis of any violation of any provision of this chapter or any implementing regulation thereof that has been corrected pursuant to paragraph (2) or (3). . (b) Direct judicial review of license revocations Section 923(f) of title 18, United States Code, is amended— (1) in paragraph (2), by striking If and inserting Except as provided in paragraph (3), if ; (2) by redesignating paragraphs (3) and (4) as paragraphs (4) and (5), respectively