Service of Notice of Violation. Upon learning of the violation, the Construction Code Official shall personally serve upon the owner of the lot whereon the violation is occurring a notice describing the violation in detail and giving the owner 10 days to abate the violation by restoring the landmark or improvement to its status quo ante. If the owner cannot be personally served within the Borough with the notice, a copy of the notice shall be posted on the site in question and a copy be sent by certified mail, return receipt requested, to the owner at his last known address as it appears on the Borough tax rolls.