When serving and selling Liquor at any community or organised event, you may need to apply for a licence to do this. Following is the link to Liquor Licensing Application here:

http://www.cbs.sa.gov.au/licensing-and-registration/liquor/

Liquor Licensing Act 1997

Responsible Service of Alcohol Training (SA) is required for people serving alcohol when events are open to the public. Further information is here:

Responsible Service of Alcohol Training (RSA)