Night work shall be work performed between 10.00 p.m. and 6.00 a.m. and for workers and employees under 16 years of age - from 8 p.m. to 6 a.m. (). The employer shall provide to the employees warm meals, refreshments and other relieving conditions for effective night work (). Night work shall be prohibited for certain categories of workers (). Workers and employees, in whose regular working time are included at least three hours of night work, as well as workers and employees, who work in shifts, one of which includes at least three hours of night work, shall be considered workers and employees, who work at night (). For night work, special regulations shall be observed ().