307. The person responsible for the maintenance of a public highway may, if he believes on reasonable grounds that a signal, sign, indication or device is erected or displayed on private property in contravention of section 306, issue a notice to the owner requiring him to remove any such object within 48 hours.
If the contravener fails to comply with the notice, the person responsible for the maintenance of the highway may enter upon the property and remove any such object at the owner’s expense.