There is a Celebrant Code of Practice
Code of Practice for Marriage Celebrants (regulation 37L) See direct link a : Code of Practice
What about the Federal Attorney-General website? See direct link at: Marriage
The regulation of marriage celebrants in Australia is administered by the Family Law and Legal Assistance Division of the Attorney-General's Department. The website contains a great deal of information which may be of interest to you. It also contains:
Register of Marriage Celebrants. See direct link at: Register of Marriage Celebrants
This is a list of Marriage Celebrants authorised by the Registrar of Marriage Celebrants. These celebrants may perform either civil or religious marriage ceremonies.
Marriage Relationship contacts:
The following agencies offer courses which may be helpful to you.
Family Services Australia