The employer may establish part-time employment for the whole or part of the period for the full-time workers. The length of working time may not be less than half the statutory one for the period of calculation of working time. 

For example, if the calculation of working time is daily, this means that part-time work cannot be entered in less than half of the statutory day. The establishment of part-time work shall be by written order of the employer on a case-by-case basis, specifying the term and the positions for which part-time work and working hours are entered.