The Chairman may, in cases of emergency, direct the execution of any work or the doing of any act which requires the sanction of the Board and the immediate execution or doing of which is, in his opinion, necessary for the service of safety of the public, and may also direct that the expenses of executing the work or of doing the act shall be paid from the funds of the Board:
Provided that—
(a) he shall not act under this section in contravention of any direction of the Board or the Government prohibiting the execution of any particular work or the doing of any particular act; and
(b) he shall report the action taken by him under this section and the reasons therefor to the Board at its next meeting and shall also submit a copy of his report to the Government, and the Board or the Government may issue such directions as it deems fit on such report.