Water Polo clubs wanting to sell alcohol at their games must apply for a liquor license. The licence controls the way alcohol is sold and distributed to club members and spectators. As each state and territory may have different legislation it is important that you contact the government in your state or territory.
Please click on the following link for more information:
http://www.ausport.gov.au/supporting/clubs/resource_library/club_management/liquor_licensing
