Wages, holiday rights and other conditions are usually regulated in the existing legislation. Check the legislation in your country.
In Austria, the cost of vocational training is borne by enterprises; the wages for the apprentice are a large part of this cost. The cost of the training is tax deductable; therefore the State indirectly cofinances the apprenticeship. (Data from 2004)
In Slovenia, this is regulated in article 42 of the Vocational Education Act, which states that every student has a right to wages in accordance with the branch collective agreement or any other regulation, during practical training The duration of practical training for secondary education students is at least 24 weeks.