Wilton Police reported that during their handicapped parking campaign they discovered several instances of expired permits.
"The Wilton Police Department would like to issue a reminder that even Permanent Parking Permits require renewal. A Permanent Parking Permit is valid for the same duration as your license or identification card, typically six years. Therefore, it is best to renew your Permanent Parking Permit at the time you renew your license or identification card," the Department said.
The below DMV link details the process: