52.50—Travel and other expenses.
Charges may be made to cover the cost of travel time incurred in connection with the performance of any inspection service, including appeal inspections, at the rate of $62.00 per hour. This includes time spent waiting for transportation as well as time spent traveling, but not to exceed eight hours of travel time for any one person for any one day: And provided further, that if travel is by common carrier, no hourly charge may be made for travel time outside the employee's official work hours.