Technically anyone can because the banks do have any special requirements and the law and our Trust deed are also silent on the matter. However we strongly recommend against having a settlor or a beneficiary or their agents as a bank signatory and we may not accept a Trust if such an arrangement is specified.
The trustees are expected to be the bank signatories and the protectors could also be appointed as joint-signatories together with the trustees. This is because the trustees and to a lesser extent the protectors are the only parties who should have control. Bank signatories have control of trust assets, namely the cash funds.