District Workers' Councils and the Central Workers' Council shall be combined with the employers' representatives and local representatives in District Economic Councils and in a Central Economic Council, for the execution of their economic functions and for joint enforcement of the Socialisation Laws. District Economic Councils and the Central Economic Council shall be so constituted as to include representatives of all important professional groups in proportion to their economic and social importance. Bills on social and economic questions of fundamental importance must be submitted by the Government of the Realm to the Central Economic Council for consideration before being introduced. The Central Economic Council is entitled itself to initiate such bills, and if the Government of the Realm objects, it must, nevertheless, submit such draft to the Reichstag with an explanation of its views. The Central Economic Council may appoint one of its members to support the bill in the Reichstag. Functions of control and of administration may be transferred to Workers' and Economic Councils within the spheres assigned to each. The organisation and objects of the Workers' and Economic Councils, and their relations to other social autonomous bodies, are exclusively in the jurisdiction of the Realm.[43] TEMPORARY CLAUSES AND FINAL CLAUSES. ARTICLE 166. Until the Supreme Administrative Court has been constituted, the Supreme Court shall appoint to the Court of electoral revision. ARTICLE 167. The provisions of Clauses 3 to 6 of Article 18 shall only come into force two years after proclamation of the constitution. ARTICLE 168. Until the act of the Realm referred to in Article 63 is promulgated, but at most for one year, the Prussian votes in the Reichsrat may be exercised by members of the Government. ARTICLE 169. The Government of the Realm shall determine at what date the regulation laid down in Clause 1 of Article 83 shall come into force. Collection and administration of customs and excise may, on their demand, be left to the Lands for a reasonable transition period. ARTICLE 170. The postal and telegraph departments of Bavaria and Würtemberg shall be transferred to the Realm at latest on April 1st, 1921. In so far as agreement concerning the terms of the transfer has not been reached by October 1st, 1920, the Supreme Court of Judicature shall decide. Existing rights and responsibilities of Bavaria and Würtemberg shall remain in force until the transfer. Nevertheless, postal and telegraphic communication with foreign countries shall be exclusively regulated by the Realm. ARTICLE 171. State railways, waterways, and marine lights shall be transferred to the Realm at latest on April 1st, 1921. In so far as agreement concerning the terms of transfer has not been reached by October 1st, 1920, the Supreme Court of Judicature shall decide. ARTICLE 172.