New South Wales Consolidated RegulationsThe licensee of a centre based or mobile children’s service must ensure that children are arranged and supervised in groups as follows:
(a) if the children are under 2 years of age, in groups of not more than 10,
(b) if the children are 2 or more years of age but under 3 years of age, in groups of not more than 16,
(c) if the children are 3 or more years of age but under 6 years of age and do not ordinarily attend school, in groups of not more than 20.