As legislation differs in each state or territory, it is difficult to outline detailed requirements for incorporated associations, but basically an incorporated association may need to: 
have a committee, responsible for managing the association
have a public officer and notify any changes in that position
have a registered office in its state of incorporation
act in accordance with its objects and rules
hold an annual general meeting once every calendar year
lodge an annual statement every year
keep proper accounting records and, in some states, prepare, have audited and lodge financial statements
keep minutes of all committee and general meetings.
keep registers of members and all committee members
have a common seal.

For more information about incorporating an association and post-incorporation obligations, visit the website of the relevant state or territory authority.

Contact details can be found here