On 23 February 2009, the government issued Decree 20 on the height management of aviation hazards and the management and protection of the airspace in Vietnam. Investors will have an interest in reviewing the provisions, requirements, necessary approvals and liabilities set in Decree 20 because the regulations apply to all buildings over 45m in height located within regulated vicinities for zoning of military and civilian airports. Decree 20 will have a retroactive effect and apply to construction projects and buildings constructed before its effective date.

The Ministry of Defence (MOD), which will co-ordinate with other competent authorities in preparing and approving the zoning plans for the development of airports and airspaces in Vietnam, will be the state body competent to issue approvals under Decree 20.

Buildings that exceed the permitted height requirements will have to reduce their height to fall outside the regulatory scope of Decree 20.