A Trustee can be either an individual or company. In the case of an individual being the trustee, this person will normally be one of the specified beneficiaries of the trust or a unit holder. When a company is acting as Trustee, usually the director/s of the company will be specified beneficiaries of the trust or unit holders.
There are occasions whereby you may need to change the trustee. Reasons for changing trustees differ, however, it is important that when you make a change to the trustee, all of your paperwork is dated appropriately and that the deed is compliant and allows for the change to occur.