The relief under Article 2 of the ZIUPTDSV is applicable only for permanent employments!
Employer can use select the relief under Article 2 of the ZIUPTDSV only in a case if he employs an unemployed person under the age of 30 for an indefinite time. If there is no entry for an indefinite time in the Employment relationship field, the program reports an error:

In the employment relationship register, the employment relationship code for an indefinite time is 1 or 3:
