Enforcement of lien.

The lien of any assessments levied under the Greater Municipality Parking Law shall be enforced, when delinquent, by the method now or hereafter provided by statute for the foreclosure of mortgages on real estate. In the event of a foreclosure sale, the municipality may buy in the property for the amount of the balance due on the assessment, including principal, interest, penalties and costs, unless there are higher bids.