Below is a list of the relevant Acts affecting minors' contracts. Click on the Act you wish to see. 

Vic: Supreme Court Act 1986 s 49 - 51

SA: Minors Contracts (Miscellaneous Provisions) Act 1979 s 4

Tas: Minors Contracts Act 1988 s 4

NSW: Minors (Property and Contracts) Act 1970 s 30 and 31