Each parking space for persons with disabilities shall be designated as reserved for persons with disabilities by a sign meeting the following requirements established in Iowa Code section 321L.6:
exception 1: Signs in use prior to February 1, 2001, which are readily visible to the driver of a vehicle approaching the parking space may continue to be used until replaced.
exception 2: Signs marking parking spaces for persons with disabilities which are affixed to other approved parking signs and devices are not required to meet the minimum or maximum height requirements of this rule, provided that the signs are clearly visible to the drivers of vehicles approaching the spaces which they mark.
Note: The pavement in a persons with disabilities parking space may be marked with the international symbol of accessibility, but such marking does not meet the requirements of this subrule.
Iowa Admin. Code r. 661-18.5