The Director of Public Safety or the Chief Building Inspector may require the repair, removal or other remedial measure with respect to a sign on private property that poses a hazard to public safety. Notice of such requirement and the reasons therefor shall be in writing and shall be served upon the owner or any other person responsible for the sign, either by personal service or by posting same at a conspicuous location at the subject site and sending a copy of same to such person by certified mail. Upon the failure to correct the condition within 10 days after such written notification, or to establish, within said time period, that no such hazardous condition exists, either director may, but shall not be required to, cause the repair, removal or other remedial measure with respect to any such sign. Notwithstanding the foregoing, the Director of Public Safety or the Chief Building Inspector may require or cause the immediate repair, removal or other remedial measure with respect to any such sign, with or without notice to the owner or any other person responsible for the sign, if either director determines that said sign poses an immediate hazard to public safety. Nothing contained herein, however, shall require either director to make any such determination or to so act in accordance therewith. In any instance in which any such sign is repaired, removed or otherwise remediated by the Town, pursuant to this paragraph, in addition to any other fine or penalty provided under this chapter, the Town shall assess all costs incurred for such service against the owner or any other person responsible for the sign, said costs to be recoverable in a civil action in the name of the Town of Smithtown.