If the County Executive finds that the average retail price of regular gasoline fuel in the region has exceeded the price of $3.00 per gallon, the County Executive may declare a Fuel Cost Emergency and may authorize the Director of Public Works and Transportation to establish a Fuel Cost Emergency Surcharge. During the emergency, the Director shall set an amount which shall be charged per trip in addition to the rates established in Section 20-160 of the Code. The fuel cost emergency surcharge shall be $1.00 for each fare. The fuel cost emergency surcharge may not be charged to any person who is sixty (60) years and over. The fuel cost emergency surcharge may not be charged for any fare pursuant to a County contract.