; and (ii) such data reasonably demonstrates that there is no additional noise impact due to the applicant's testing of supersonic or hypersonic civil aircraft. (B) Exception The Administrator may require an additional environmental impact analysis regarding noise impact if the Administrator certifies that extraordinary circumstances exist to justify such additional analysis. (3) Reuse of research and findings The Administrator shall reuse any applicable research and findings from a prior supersonic or hypersonic civil aircraft test and incorporate such research and findings into any applicable analysis necessary to grant a special flight authorization if the prior supersonic or hypersonic civil aircraft test— (A) was under similar conditions to the testing proposed by the applicant for the special flight authorization; and (B) considered similar issues or decisions as the testing proposed by the applicant for the special flight authorization. (e) Civil Testing The Secretary of Defense shall allow civil aircraft testing as described in subsection (b)(2), unless— (1) such testing would interfere with any military operations or testing in the corridor; or (2) the Administrator has not granted a special flight authorization under section 91.818(c) of title 14, Code of Federal Regulations, for such testing.