Article 46 Exemption from registration of aliens and residence permits 1. Consular officers and consular employees and members of their families forming part of their households shall be exempt from all obligations under the laws and regulations of the receiving State in regard to the registration of aliens and residence permits. 2. The provisions of paragraph 1 of this article shall not, however, apply to any consular employee who is not a permanent employee of the sending State or who carries on any private gainful occupation in the receiving State or to any member of the family of any such employee. Article 47 Exemption from work permits 1. Members of the consular post shall, with respect to services rendered for the sending State, be exempt from any obligations in regard to work permits imposed by the laws and regulations of the receiving State concerning the employment of foreign labour. 2. Members of the private staff of consular officers and of consular employees shall, if they do not carry on any other gainful occupation in the receiving State, be exempt from the obligations referred to in paragraph 1 of this article. Article 48 Social security exemption 1. Subject to the provisions of paragraph 3 of this article, members of the consular post with respect to services rendered by them for the sending State, and members of their families forming part of their households, shall be exempt from social security provisions which may be in force in the receiving State. 2. The exemption provided for in paragraph 1 of this article shall apply also to members of the private staff who are in the sole employ of members of the consular post, on condition: (a) that they are not nationals of or permanently resident in the receiving State; and (b) that they are covered by the social security provisions which are in force in the sending State or a third State. 3. Members of the consular post who employ persons to whom the exemption provided for in paragraph 2 of this article does not apply shall observe the obligations which the social security provisions of the receiving State impose upon employers. 4. The exemption provided for in paragraphs 1 and 2 of this article shall not preclude voluntary participation in the social security system of the receiving State, provided that such participation is permitted by that State. 19