3 When an empty-heating prevention test as specified in the  General Rules for JIS Tests 19.2 is conducted in a JIS  Laboratory, the results meet the following conditions.  (1) Ignition is not possible unless there is water in the bathtub.  (2) When water decreases after it has been supplied into the  bathtub, the fire is extinguished within 10 seconds (within five  minutes in the case of a pot-type heater) after the water level  reaches the upper edge of the lower circulation tube (the lower  edge of the lower circulation tube in the case of a forced- circulation heater). In addition, even if water is supplied into  the bathtub and the fire is reignited immediately after it has  been extinguished, neither a flame is produced outside the  heater nor does the heater break.  4 When a vibration test as specified in the General Rules for JIS  Tests 29.1 and 29.2 is conducted in a JIS Laboratory, and the  heater is vibrated at 195 centimeters per second per second with  each of the frequencies of 0.3 seconds, 0.5 seconds, and 0.7  seconds, the results comply with the conditions set forth in (1)  or (2) below, and no abnormal combustion occurs before the fire  is extinguished.  (1) The fire extinguishing device is activated within 10 seconds,  and the fire is extinguished within 10 seconds after the fire  extinguishing device has been activated.  (2) In the case of a pot-type heater, the fire extinguishing device  is activated within 10 seconds, and the heating oil is cut off  instantly after the fire extinguishing device has been activated,  the fire is extinguished within five minutes, and no flaming or  ignition occurs in an ignition test of falling combustible material  as specified in the General Rules for JIS Tests 30.  5 In the case of a pressure-spray-type heater, when a flame  failure protection test as specified in the General Rules for JIS  Tests 52. is conducted in a JIS Laboratory, and the supply of  heating oil is resumed, the heater does not automatically  resume combustion.  6 (1) The heater indicates the name of the Notifying Enterprise  in such a manner whereby it does not fade easily; provided,  however, that an abbreviated name or a mark for which the  approval of the Minister of Economy, Trade and Industry has  been obtained or a Registered Trademark which has been  notified to the Minister of Economy, Trade and Industry may be  indicated in lieu of the name of the Notifying Enterprise.  (2) Precautions for use that will be necessary for ensuring safe  use are appropriately indicated in such a manner whereby it  does not fade easily.  39 