The Australian Standards for stair nosings are outlined in AS 1428.1-2009 Design for Access and Mobility, which provides guidelines for the design and installation of stairways and associated components to ensure accessibility and safety for all users, including people with disabilities.
The path of travel should have nosings on the treads with a minimum depth of 50mm and a maximum depth of 75mm contrasting anti-slip strip. The nosing strip must have a contrast of at least 30% to the floor finish. The nosing strip is allowed to be set back up to 15mm from the front of the nosing.