Part of a comprehensive analysis of the Air Navigation Act 1966
All Parts in This Series
Analysis of Key Provisions in the Air Navigation Act 1966: Obstruction Control Near Aerodromes
The Air Navigation Act 1966 (the “Act”) contains a comprehensive framework to safeguard air navigation by regulating obstructions near aerodromes. This analysis focuses on the key provisions under Part VI of the Act, which empower the Civil Aviation Authority of Singapore (the “Authority”) to manage and control structures and vegetation that may pose risks to aircraft operations. The provisions also establish mechanisms for compensation and penalties, ensuring compliance and fairness. Understanding these provisions is essential for stakeholders such as airport operators, landowners near aerodromes, and government agencies.
Section 70: Authority to Require Warning of Obstructions
Section 70(1) authorises the Authority to require warnings for obstructions near aerodromes when it is satisfied that such measures are necessary to prevent danger to aircraft. The provision states:
"if the Authority is satisfied... that... provision ought to be made... for giving to the aircraft warning of the presence of that structure" — Section 70(1), Air Navigation Act 1966
Verify Section 70 in source document →
This provision exists to proactively mitigate risks posed by tall structures or other obstructions that could interfere with aircraft during critical phases of flight such as takeoff and landing. By mandating warnings—such as lights or markers—the Authority enhances situational awareness for pilots, thereby reducing the likelihood of collisions or accidents.
Section 70(9) further defines key terms to clarify the scope of this power:
"in this section — (a) 'aerodrome to which this section applies' means any premises which... are for the time being licensed as an aerodrome for public use or any Government aerodrome; and (b) 'proprietor of the aerodrome', in relation to any premises used or appropriated for use as an aerodrome, means the airport licensee or exempt airport operator under the Civil Aviation Authority of Singapore Act 2009 for those premises, or, in the case of a Government aerodrome, the officer in charge of the aerodrome." — Section 70(9), Air Navigation Act 1966
These definitions ensure that the Authority’s powers apply to all relevant aerodromes, whether public or government-operated, and identify the responsible parties for compliance.
Section 71: Exemptions for Government and Military Aircraft
Section 71(1) exempts aircraft belonging to the Government, Singapore Armed Forces, or visiting lawful forces from the application of this Part, but retains the Authority’s discretion to apply provisions as necessary:
"this Part does not apply to aircraft belonging to or exclusively employed in the service of the Government or of the Singapore Armed Forces or of any visiting force lawfully present in Singapore" — Section 71(1), Air Navigation Act 1966
Verify Section 71 in source document →
This exemption recognises the unique operational requirements and sovereign status of government and military aircraft, which may not be subject to the same regulatory constraints as civilian aircraft. However, the Authority’s retained power to apply provisions ensures that safety is not compromised, balancing operational flexibility with risk management.
Sections 72 and 73: Declaration and Regulation of Controlled Areas
Section 72 empowers the Authority to declare controlled areas around aerodromes to maintain safe airspace free from obstructions:
"the Authority... may declare the area to be a controlled area... and must define the boundaries of that area" — Section 72, Air Navigation Act 1966
Verify Section 72 in source document →
Controlled areas are designated zones where the Authority exercises heightened control to prevent hazards to air navigation. Defining clear boundaries provides legal certainty for landowners and developers regarding permissible activities.
Section 73 complements this by allowing the Authority to regulate or prohibit the erection of structures or planting of high vegetation within these controlled areas:
"the Authority may, by order, prohibit absolutely or conditionally or regulate the erection of any structure... or the planting of any tree or other high growing vegetation, within a controlled area" — Section 73, Air Navigation Act 1966
Verify Section 73 in source document →
This power exists to prevent the creation of new obstructions that could endanger aircraft. By regulating both construction and vegetation growth, the Authority addresses all potential sources of obstruction comprehensively.
Section 74: Removal or Alteration of Obstructions
Section 74(1) enables the Authority to require owners or occupiers to remove or reduce the height of existing structures or vegetation that obstruct air navigation:
"may, by written notice, require the owner or occupier... to remove or reduce in height any structure... or any tree or other high growing vegetation" — Section 74(1), Air Navigation Act 1966
Verify Section 74 in source document →
This provision is critical for maintaining ongoing safety, allowing the Authority to respond to emerging risks or changes in the environment. It ensures that obstructions are not only prevented but also actively managed if they arise.
Section 75: Power of Entry for Surveying Controlled Areas
To effectively monitor and enforce obstruction controls, Section 75(1) grants authorised officers the power to enter controlled areas for surveying and taking levels:
"any officer authorised... may enter upon, survey and take levels of any controlled area" — Section 75(1), Air Navigation Act 1966
Verify Section 75 in source document →
This power facilitates accurate assessment of the terrain and structures within controlled areas, enabling the Authority to make informed decisions regarding obstruction risks. It also supports enforcement actions by verifying compliance.
Sections 76 to 79: Compensation and Dispute Resolution
Recognising that compliance with obstruction control orders may cause damage or expenses to landowners, Sections 76 to 78 provide for compensation:
"the owner or occupier... must... receive compensation to the extent to which... suffered damage... or incurred such expense" — Section 76, Air Navigation Act 1966
Verify Section 76 in source document →
This ensures fairness by reimbursing affected parties for losses directly attributable to compliance with the Authority’s orders or entry onto land. It balances public safety interests with private property rights.
Section 79 establishes the procedure for settling compensation claims, allowing for agreement or arbitration:
"the amount of the compensation must be determined by agreement or... by a single arbitrator appointed by the Chief Justice" — Section 79, Air Navigation Act 1966
Verify Section 79 in source document →
This dispute resolution mechanism provides an efficient and impartial means to resolve compensation disagreements, reducing litigation and promoting timely settlements.
Penalties for Non-Compliance: Section 70(7)
To enforce compliance, Section 70(7) prescribes penalties for wilful interference with works or warnings placed under the Authority’s orders:
"if any person contravenes any of the provisions of subsection (6), the person shall be guilty of an offence and shall be liable on conviction to a fine not exceeding $2,000 or to imprisonment for a term not exceeding 6 months or to both." — Section 70(7), Air Navigation Act 1966
Verify Section 70 in source document →
This deterrent is necessary to uphold the integrity of obstruction control measures. Without enforceable penalties, individuals might disregard safety requirements, increasing risks to aircraft and passengers.
Cross-References to Other Legislation
The Act cross-references the Civil Aviation Authority of Singapore Act 2009 in defining the “proprietor of the aerodrome” as the airport licensee or exempt airport operator under that Act:
"'proprietor of the aerodrome'... means the airport licensee or exempt airport operator under the Civil Aviation Authority of Singapore Act 2009 for those premises" — Section 70(9)(b), Air Navigation Act 1966
Verify Section 70 in source document →
This linkage ensures consistency in regulatory oversight and clarifies the responsible entities for compliance with obstruction control provisions. It integrates the Air Navigation Act’s obstruction controls within the broader civil aviation regulatory framework.
Conclusion
The obstruction control provisions under the Air Navigation Act 1966 serve a vital role in safeguarding Singapore’s airspace around aerodromes. By empowering the Authority to declare controlled areas, regulate and remove obstructions, and enforce compliance with penalties, the Act mitigates risks to aircraft operations. The inclusion of compensation mechanisms and clear definitions balances public safety with property rights, while cross-references to other legislation ensure regulatory coherence. Stakeholders must understand these provisions to ensure compliance and contribute to aviation safety.
Sections Covered in This Analysis
- Section 70 (1), (7), (9)
- Section 71 (1)
- Section 72
- Section 73
- Section 74 (1)
- Section 75 (1)
- Sections 76 to 79
Source Documents
For the authoritative text, consult SSO.