Consents to the execution of a trust for sale

(1) If the consent of more than two persons is by the disposition made requisite to the execution of a trust for sale of land then, in favour of a purchaser, the consent of any two of such persons to the execution of the trust or to the exercise of any statutory or other powers vested in the trustees for sale shall be deemed sufficient. (2) Where the person whose consent to the execution of any such trust or power is expressed to be required in a disposition is not sui juris or becomes subject to disability, his consent shall not, in favour of a purchaser, be deemed to be requisite to the execution of the trust or the exercise of the power, but the trustees shall, in any such case, obtain the separate consent of the parent or testamentary or other guardian of an infant or of the committee of a person of