Staff may be asked by an employer to vary their work hours of shift lengths. Shift lengths and hours of work must still comply with the applicable provisions in your Award, enterprise agreement or contract of employment. This means that: An employer must also comply with the required notification of roster changes in your award or agreement. If you are part-time and have set hours of work, your employer may not be able to vary these hours without your agreement (although this may depend on what your contract/Agreement says). An employer and employee may agree to any changes (so if you want to work the additional hours you can). Your employer is still required to pay appropriate penalty rates and overtime rates. You must be provided with the minimum break between shifts. You have a right to refuse overtime, where the request to work overtime is unreasonable.  If you If you are unsure, contact the Union for assistance.