(1) A trustee may insure against loss or damage by fire any building or other insurable property to any amount (including the amount of any insurance already on foot) not exceeding three equal fourth parts of the full value of such building or property, and pay the premiums for such insurance out of the income thereof or out of the income of any other property subject to the same trusts, without obtaining the consent of any person who may be entitled wholly or partly to such income.
(2) This section does not apply to any building or property which a trustee is bound forthwith to convey absolutely to any beneficiary upon being requested to do so.
(3) This section applies to trusts created either before or after the commencement of this Act, but nothing in this section shall authorise any trustee to do anything which he is in express terms forbidden to do, or to omit to do anything which he is in express terms directed to do, by the instrument creating the trust.