Not working may be fundamentally different from work only after written consent agreed, except in case of necessity, and not more than thirty days in the year.
May not be assigned worker job differs substantially from the agreed upon only after his written consent, except in case of necessity, and not more than thirty days in the year.
May be assigned to the worker work fundamentally different from the agreed only after written consent, except in case of necessity, and no more than thirty days a year.