Where a legal estate in land (whether settled or not) is vested in a lunatic, or a defective, either solely or jointly with any other person or persons, his committee or receiver shall, under an order in lunacy or of the court, or under any statutory power, make or concur in making all requisite dispositions for conveying or creating a legal estate in the name and on behalf of the lunatic or defective.

If land held on trust for sale is vested in a lunatic, or a defective, either solely or jointly with any other person or persons, a new trustee shall be appointed in his place, or he shall be otherwise discharged from the trust, before the legal estate is dealt with under the trust for sale or under the powers vested in the trustees for sale.