The time within which summary proceedings may be taken for the recovery of any sum which a highway authority or council are entitled to recover under this Act shall be reckoned—
in all cases except the one mentioned in paragraph (b) below, from the date of the service of a demand for the sum; and
in a case in which an appeal has been made to the Minister under section 233 above, from the date on which the decision on the appeal is notified to the appellant or the appeal is withdrawn, as the case may be.