Sri Lanka has ratified and given effect to the Chicago Convention on Civil Aviation by enacting domestic legislation. The Chicago Convention, its Annexes together with the Standards and Recommended Practices (SARPS) formulated under the Chicago Convention have been given the effect and force of law in Sri Lanka. This has been done through multiple statutory instruments; inter alia, the Civil Aviation Authority Act No 34 of 2002, the Civil Aviation Act 14 of 2010 and the Air Navigation (Special Provisions) Act 2 of 1982. A state-owned corporate body is also established to manage and operate international and customs aerodromes in Sri Lanka. Aerodromes in Sri Lanka are also subject to and are indirectly impacted by quasi-rules and regulations formulated by international non-governmental organizations such as International Air Transport Association (IATA) and Airports Council International (ACI), particularly when serving as customs aerodromes into which international airlines operate. This chapter provides an overview of all statutory and regulatory provisions applicable to the operations of international customs aerodromes in Sri Lanka. It also examines the regulatory oversight and compliance levels of the main international airport as reported in ICAO audits. Discussions on some operational problems and suggestions on remedies are also part of this chapter.