The manager or supervisor shall observe all rebound-tumbling devices whenever they are in use and it shall be the duty of the manager or supervisor to enforce the rules set forth in BMC 5.40.050 and any other safety rules or regulations deemed necessary by the planning commission.

Each unit shall be numbered or otherwise clearly designated. A suitable loudspeaker system shall be maintained to enforce the rules, except where there are less than eight rebound-tumbling devices. The managers or supervisors shall have readily distinguishable warning sound devices available to stop all rebound-tumbling activity if necessary. There shall be one manager or supervisor on active supervising duty for each 12 rebound-tumbling devices or fractional part which is in use. (Ord. 310 § 6, 1960).