In this Act, unless the contrary intention appears Board means the Hospitals and Ambulance Service Advisory Board established under section 6 ;Commonwealth Act means the Health Insurance Act 1973 of the Commonwealth;eligible person means an eligible person within the meaning of the Commonwealth Act;health service establishment means a private medical establishment within the meaning of the Hospitals Act 1918 or a day hospital facility within the meaning of the National Health Act 1953 of the Commonwealth;Medicare commitments means the commitments set out in section 26(2) of the Commonwealth Act and in Part 2 of Schedule 1;Medicare principles means the principles set out in section 26(2) of the Commonwealth Act and in Part 1 of Schedule 1;professional association means an association, society, college or other body of health professionals.