Discriminating on the basis of age in areas of public life such as accommodation, education, employment and services is Prima facie unlawful under the Age Discrimination Act in Australia. It's unlawful unless a law renders it lawful or if certain other exemtions apply.
Services are a bit of a grey area and I doubt anyone really understands what the High Court was saying in IW v City of Perth but I had the Full Court of the Federal Court hold that the provision of a birth certificate is a service.
I seem to remember that Australian commercial pilots working in RPT had to retire at 60 until an inquiry was conducted and, based on actuarial data, the age was increased to 65. That issue did not, as far as my recollection goes, see the Court examine the issue of a licence as property and therefore it's revocation being a matter for compensation on just terms under the Constitution. One day....
Kaz