The registration requirement under section 17 (1) and (2) does not apply to
1. members of a foreign diplomatic mission or foreign consular representation and family members living with them in the same household if the persons referred to do not have German nationality, are not permanently resident in Germany and are not in gainful employment,
2. persons for whom this exemption has been stipulated in international treaties.
Exemption from the registration requirement under sentence 1 no. 1 applies only on the basis of reciprocity.