The curfew has been in place for at least 30 years.
Neither major party has made any effort to relax the rules.
The previous Coalition Government were in power for 11 years and did nothing.
Have a look at the electorates around Sydney Airport - the close in electorates are held by Labour and ones on the flight paths are held by the Liberals - seats like Wenworth (Turnbull) Cook (Morrison) North Sydney (Hockey) Bradfield ( Abbott).
So if anyone thinks there will be a relaxation of the rules - "Tell them they are Dreaming"