(1) The duration of annual leave in proportion to the time worked in a year of employment shall be calculated by multiplying the duration of leave for one month by the number of complete months worked in that year of employment.

(2) Decimals obtained in calculating the duration of annual leave in proportion to the time worked in a year of employment equal to 0.5 and more shall be rounded up to one day and less than 0.5 shall be excluded from the calculation.

(3) The calculation of full months worked in a working year shall be made as follows:

a) the days worked in a working year are counted;

b) the amount obtained is divided by the average monthly number of working days per year;

c) the balance of days, which constitutes 15 or more calendar days, is rounded up to a full month;

d) for the balance of days from 6 to 14 calendar days, the employee will be granted 1 day of leave.