Sec. 513. Obstruction evaluation aeronautical studies. Sec. 514. Aircraft leasing. Sec. 515. Report on obsolete test equipment. Sec. 516. Pilots sharing flight expenses with passengers. Sec. 517. Aviation rulemaking committee for part 135 pilot rest and duty rules. Sec. 518. Metropolitan Washington Airports Authority. Sec. 519. Terminal Aerodrome Forecast. Sec. 520. Federal Aviation Administration employees stationed on Guam. Sec. 521. Technical corrections. Sec. 522. Application of veterans’ preference to Federal Aviation Administration personnel management system. Sec. 523. Public aircraft eligible for logging flight times. Sec. 524. Federal Aviation Administration workforce review. Sec. 525. State taxation. Sec. 526. Aviation and aerospace workforce of the future. Sec. 527. Future aviation and aerospace workforce study. Sec. 528. FAA leadership on civil supersonic aircraft. Sec. 529. Oklahoma registry office. Sec. 530. Foreign air transportation under United States-European Union Air Transport Agreement. Sec. 531. Training on human trafficking for certain staff. Sec. 532. Part 107 implementation improvements. Sec. 533. Part 107 transparency and technology improvements. Sec. 534. Prohibitions against smoking on passenger flights. Sec. 535. Consumer protection requirements relating to large ticket agents. Sec. 536. FAA data transparency. Sec. 537. Agency procurement reporting requirements. Sec. 538. Zero-emission vehicles and technology. Sec. 539. Employee Assault Prevention and Response Plans. Sec. 540. Study on training of customer-facing air carrier employees. Sec. 541. Minimum dimensions for passenger seats. Sec. 542. Study of ground transportation options. Sec. 543. FAA employees in Guam. Sec. 544. Clarification of requirements for living history flights. Sec. 545. FAA organizational reform. Sec. 546. Intra-agency coordination. Sec. 547. FAA Civil Aviation Registry upgrade. Sec. 548. Regulatory streamlining. Sec. 549. Administrative Services Franchise Fund. Sec. 550. Report on air traffic control