There are a number of websites where you can find information on Commonwealth and State legislation relevant to the Royal Commission.
Royal Commissions Act 1902 (Cth)
Royal Commissions Regulations 2001 (Cth)
Royal Commissions Act 1923 (NSW)
Evidence (Miscellaneous Provisions) Act 1958 (Vic)
Commissions of Inquiry Act 1950 (Qld)
Royal Commissions Act 1917 (SA)
Royal Commissions Act 1968 (WA)