5. Such, at least, is my understanding of the section. The application of sub-s. (1) is conditional upon the opinion of the Court that "any sale, lease, mortgage, surrender, release, or disposition, or any purchase, investment, acquisition, expenditure, or transaction" is expedient in the management or administration of trust property, but cannot be effected, by reason of the absence of any power for that purpose vested in the trustees. The Court, then, must have before it, on an application with respect to investment, a specific proposal for investment, upon the expediency of which it may form a judgment. If the condition be satisfied, the jurisdiction of the Court is to confer upon the trustees, "either generally or in any particular instance, the necessary power for the purpose, on such terms, and subject to such provisions and conditions . . . as the Court may think fit". It may be possible for the Court to be satisfied that it will be expedient to do a particular thing, within the wide descriptions contained in sub-s. (1), whenever a defined situation arises; and, if the Court is so satisfied, of course it may confer the necessary power for the purpose generally. But I am unable to see that this can ever be so with respect to investment. The expediency of an investment must be decided in the light of all the circumstances existing at the time it is to be made, and in my opinion it would be impossible to devise an order giving a general power of investing in shares, however carefully framed might be the terms, provisions and conditions inserted in the order, which would be free from the objection that it delegates to the trustees, to some extent at least. the function which the section commits to the Court, namely, the function of deciding whether the making of a given investment is expedient. Sub-section (2) is differently expressed, but produces the same result. Under it the question of expediency arises with respect to an alteration of the trusts or powers of the trustees; but the jurisdiction of the Court is confined to authorizing the trustees to do or abstain from doing an act or thing which would be a breach of trust if done or omitted without the authorization of the Court or the consent of the beneficiaries. It seems clear that what is referred to by the words "an alteration . . . of the trusts or powers conferred on the trustees" is not a general alteration, but is such an alteration as is involved in the authorization of the doing of or abstention from a particular act or thing. The section as a whole may be usefully contrasted with s. 83, and particularly with sub-s. (3) of that section. The contrast is between a jurisdiction to sanction what the Court judges for itself to be expedient, and a jurisdiction to confer on a trustee a power which will enable him to decide for himself whether an exercise of it will be expedient or not. (at p234)