123. Order granting loans conclusive of certain matters.

(a) that the work described or the purpose for which the loan is granted, is an improvement or productive purpose, as the case may be, within the meaning of Section 116;
(b) that the person had at the date of the order a right to make such an improvement, or incur expenditure for productive purpose, as the case may be; and
(c) that the improvement is one benefiting the land specified and the productive purpose concerns the land offered in security, or any part thereof as may be relevant.