Make sure your own smoke detector is not out of date, apart from the battery. If it is older than 8 years it's most likely expired. (Coles have them for $11 with battery)

https://www.fairtrading.nsw.gov.au/about-fair-trading/legislation-and-publications/changes-to-legislation/new-residential-tenancy-laws

Minimum standards to clarify 'fit for habitation'

Newsmoke alarm obligations for landlords

Changesof a 'minor nature'

Damage and removing modifications

New mandatory set break fees for fixed term agreements

Strengthened information disclosure requirements

New material facts

New information to be disclosed to prospective strata tenants

Remedies for tenants for breaches to information disclosure requirements

Additional water efficiency measures

New rectification order process

New standard form of agreement

New condition report

Newlandlord information standard

Other changes