Section 11. Enforcement of The Lien. If the owner, administrator or occupant fails to reimburse the government of the expenses incurred in the summary abatement within ninety (90) days from the completion of such abatement, the building or structure shall be sold at public auction in accordance with existing laws and rules. No property subject of lien under Section 10 hereof, may be sold at a price lower than the abatement expenses incurred by the government. The property shall be forfeited in favor of the government if the highest bid is not at least equal to the abatement expenses.