Under the Marriage Act 1961 there are certain obligations that you, as a couple intending to get married, must meet prior to a Marriage Ceremony being solemnised:

1. A Notice of Intended Marriage (Nim) must be lodged with your Marriage Celebrant no less than one month and one day, and no more than eighteen months prior to the marriage being soleminised, and within the above time frame
   
   
2. You are required to produce your original Birth Certificate, or authorised extract of such certificate. Persons born in Australia MUST produce their birth certificates. Persons born outside Australia are also required to produce birth certificates. However, in the absence of that document they may produce their Passport and/or Citizenship papers
   
   
3. In the case of persons previously married a copy of the Decree Absolute or Death Certificate, whichever is applicable, must be produced
   
   
4. Prior to your wedding both partners will be required to sign a declaration, under the Marriage Act 1961, stating that you believe there is no legal impediment to the marriage between yourself and your partner
   
   
5. Under the Marriage Act 1961 two persons under the age of eighteen cannot marry and any person under eighteen must obtain parental consent and approval of a court of law. Feel free to talk to your Celebrant about this