1. On days or in areas City Council has designated by resolution as exempt from posted parking time limits;

2. To official City, state or federal vehicles necessarily in use for construction or repair work, or to a vehicle with a Special Permit for Delivery, Maintenance or Construction or to federal or private vehicles primarily used for the collection, transportation, or delivery of mail and parcels;

3. To vehicles used in official public improvement projects in accordance with the terms of a public contract or official permit.