The binding legal principles are: (1) Under section 13 of the Trust Property Control Act, the founder's intention is determined from the trust deed, not from verbal wishes expressed subsequently. (2) The first jurisdictional requirement under section 13 (the 'anchor jurisdictional factor') requires that the impugned provisions have brought about consequences the founder did not contemplate or foresee. This must be satisfied before considering whether any of the requisites in section 13(a), (b) or (c) are met. (3) Where a trust deed gives trustees sole discretion to determine a vesting date and continue the trust indefinitely, and the founder did not take steps to vary these provisions, the founder must be taken to have contemplated that trustees would exercise this discretion, and that beneficiaries would accept the trustees' decision. (4) Beneficiaries under a discretionary trust who have no vested rights cannot insist that trustees exercise their discretion to fix a vesting date. (5) Where trustees exercise their discretion reasonably in accordance with the trust deed and in furtherance of the trust objectives, their conduct cannot be said to bring about consequences unforeseen by the founder. (6) Applicants under section 13 must establish a causal relationship between the impugned provisions and the hampering of trust objectives or prejudice to beneficiaries. (7) Family breakdown caused by beneficiaries' legally and factually untenable demands does not satisfy the jurisdictional requirements of section 13.