Singapore legislation
Regulation 40
of Civil Aviation Authority of Singapore (Changi Airport) By-laws 2009
Regulation 40
No unescorted airline passengers entering airside
Subregulation 1
No passenger about to embark onto or disembark from an aircraft shall enter the airside without being escorted by an employee or agent of an airline.
Subregulation 2
No airline shall permit any of its passengers to enter the airside without being escorted by an employee or agent of the airline.