The Decision is issued under s. 204(3) of the Labour Code. It allows the employment of young men over the age of 16 years (hereinafter referred to as "young persons") in certain prohibited jobs specified in the Decision of the Council of Ministers of 26 Sept. 1958. Such employment is permitted to the extent necessary for vocational preparation in certain trades related to the maintenance of machinery and equipment, the assembly of engineering equipment and automatic and electronic industrial systems in mining. The permits shall apply to work in underground coal mines and shall not be applicable to work to be carried on continuously. Young persons shall be employed only in training posts under the supervision of vocational teachers or instructors. Young persons may work only 14 days in a month and their hours of work shall not exceed 4 hours over a period of 24 hours (from the age of 16 to 17 years) and 6 hours over a period of 24 hours (from the age of 17 to 18 years).