90.The powers of delegation conferred by Part IV are exercisable by the trustees collectively.  Section 25 makes clear that with one exception Part IV of the Act applies equally to a trust with a sole trustee as to a trust with a body of trustees.  The exception is that a trust corporation which is a sole trustee need not appoint a custodian of any securities payable to bearer forming part of the trust property (section 18).  References to the trustees are therefore to be taken to include sole trustees except in sections 12(1) and (3) and 19(5).
91.Section 12(1) authorises the appointment under section 11 of one of a number of trustees as agent.  Section 19(5) permits the appointment of a trustee which is a trust corporation or two or more trustees as nominees or custodians under sections 16, 17 or 18.  These exceptions also make clear that a sole trustee cannot be his or her own agent, nominee or custodian.  Section 12(3) prohibits the appointment of a beneficiary as an agent under section 11.
Commentary on Sections Part IV: Agents, Nominees and Custodians Section 25: Sole trustees