Some of a trustee's duties and responsibilities are set out in the Trustee Act 1936 (SA) while the great bulk are found in the common law. Sometimes it is necessary or advisable to add to these, or vary them, in the terms of the will. Generally, trustees have a high duty to act honestly and in good faith when carrying out particular duties of trust given to them under a will.
A beneficiary who is dissatisfied with the performance of a trustee may complain to the court.