The duration of employment must not exceed 2 months or 346 hours per calendar year, regardless of whether it involves one or multiple contracts.
It is therefore possible to conclude one or more part-time student contracts exceeding a total of 2 months during one or several school holiday periods, as long as the total does not exceed 2 × 173 hours = 346 hours per calendar year.
Example
It is possible to conclude one or more half-time student contracts of 20 hours per week (= 86.5 hours per month) over a period of 4 months per calendar year (4 × 86.5 = 346 hours).