This clause of part 1 is applicable, except as follows: 1.1 Replacement: This standard applies to appliances for heating food and beverages using electromagnetic energy (microwaves) in one or more of the I.S.M. frequency bandst) between 300 MHz and 30 GHz and intended for household use. These appliances may also incorporate a browning or steaming function. For combination microwave ovens IEC 335.2-6 is also applicable. This standard does not take into account the special hazards which exist in nurseries and other places where there are young children or aged or infirm persons without 8upervision; in such cases additional requirements may be necessary. This standard does nol apply 10: appliances for industrial purposes; appliances intended to be used in locations where special conditions prevail, such as Ihe presence of a corrosive or explosive atmosphere (dusl, vapour or gas); appliances for medical purposes. Until an IEC standard for microwave ovens for commercial purposes is issued, this standard may form a guide to suitable requirements and tests for such appliances. For appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary . For appliances intended to be used in tropical counllies, special requirements may be necessary. Attention is drawn to the fact that in many countries additional requirements are specified by the national health authorities and the national authorities responsible for the protection of labour.