For industrial reasons the employer can extend, by a written order, the working time during some working days and compensate it through its respective reduction during others upon preliminary consultations with the representatives of the trade union organizations and the representatives of the workers and employees (art. 136а, para. 1 of LC). The duration of the extended working day cannot exceed 10 hours, and for the workers and employees working under reduced hours - up to 1 hour in excess of their reduced working time. In these cases, the duration of the working week may not exceed 48 hours, and for the workers and employees with reduced working time – 40 hours. The employer shall be obliged to keep a special book for accounting the extension, respectively the compensation of the working time (art. 136а, para. 2 of LC). The extension of the working time shall be admitted for a period of 60 working days during one calendar year, but for no longer than 20 working days consecutively (art. 136а, para. 3 of LC).
In the cases of extended working hours, the employer shall be obliged to compensate the extension of the working time by its respective reduction within 4 months for each extended working day. If the employer does not compensate the extension of the working time in the above period the worker or employee shall have the right to determine himself the time during which the extension of the working time will be compensated by its respective reduction, informing about that the employer in writing at least two weeks in advance (art. 136а, para. 4 of LC). In terminating the employment relationship before the compensation of the extended working hours, the difference up to the normal working day shall be paid as overtime work (art. 136а, para. 5 of LC). For the workers and employees whose performance of overtime work is prohibited, extension of the working hours shall be admitted under the aforementioned conditions for overtime work (art. 136а, para. 6 of LC).