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Regulations. From January 1, 2024 through December 31, 2029, this exemption applies only to the use of qualifying tangible personal property by: (A) persons who modify, refurbish, complete, repair, replace, or maintain aircraft and who (i) hold an Air Agency Certificate and are empowered to operate an approved repair station by the Federal Aviation Administration, (ii) have a Class IV Rating, and (iii) conduct operations in accordance with Part 145 of the Federal Aviation Regulations; and (B) persons who engage in the modification, replacement, repair, and maintenance of aircraft engines or power plants without regard to whether or not those persons meet the qualifications of item (A). The exemption does not include aircraft operated by a commercial air carrier providing scheduled passenger air service pursuant to authority issued under Part 121 or Part 129 of the Federal Aviation Regulations. The changes made to this paragraph (35) by Public Act 98-534 are declarative of existing law. It is the intent of the General Assembly that the exemption under this paragraph (35) applies continuously from January 1, 2010 through December 31, 2024; however, no claim for credit or refund is allowed for taxes paid as a result of the disallowance of this exemption on or after January 1, 2015 and prior to February 5, 2020 (the effective date of Public Act 101-629). (36) Tangible personal property purchased by a public-facilities corporation, as described in Section SB3019 Enrolled LRB104 20255 HLH 33706 b Public Act 104-0468