73. Holders of a taxi owner’s permit offering specialized limousine or “de grand luxe” limousine services must propose rates to the Commission for their limousine or “de grand luxe” limousine services which must include a one-hour minimum to be charged to all clients as soon as the limousine or “de grand luxe” limousine is placed at their disposal. They are also authorized to ask the Commission to take fractions of hours into account in fixing their rates after the first hour charged.