New South Wales has legislation which protects workers under the age of 18 years. If under 18 years of age your employer will need to ensure that you receive pay and conditions in your AWA or other agreement that are not less overall than the existing NSW award which covers the work you do.
The laws also protect you from being unfairly dismissed and ensures that you have access to the NSW Office of Industrial Relations (OIR) and the Industrial Relations Commission.
If you work in NSW, and you think you are being treated unfairly, for example not receiving correct pay or breaks, or if you have other questions, you can phone the NSW Office of Industrial Relations on 131 628. Your enquiries are treated confidentially.
You may be asked to sign other sorts of informal agreements (i.e. devised by individual employers) or other documents which verify that you have received important information (e.g. Occupational Health and Safety information). Make sure if you are under 18 that a parent or guardian signs.
The legislation can be read at: http://www.legislation.nsw.gov.au/fullhtml/inforce/act+96+2006+FIRST+0+N?#fn