ARTICLE 93. The Government shall, with the consent of the Reichsrat, set up Advisory Committees for Railway Communication and Rates for the national railways. ARTICLE 94. When the Realm has taken over the railways serving public communication within a particular district, new railways serving public communication may not be built within such district except by the Realm or with the consent of the Realm. Should the building of new lines, or the alteration of existing lines, touch on the province of the police authorities of a Land, the railway administrative authorities must consult the local authorities before deciding. Where the Realm has not yet taken over the administration of the railways, it may, by act of the Realm, build at its own cost, or commission others to build, with the right of expropriation, such railways as may be essential to public communication or national defence notwithstanding that those Lands, through whose territories such railways run, object; nevertheless, the sovereign prerogatives of the Lands shall not hereby be affected. Every railway must permit another railway to effect a junction with it at the cost of the latter. ARTICLE 95. Railways serving purposes of public communication which are not administered by the Realm are subject to the supervision of the Realm. Railways subject to the supervision of the Realm shall be constructed and equipped on the same principles as those laid down by the Realm. They must be maintained in good working order and must be extended to meet traffic requirements. Passenger and goods traffic must be served according to their requirements. In regulating rates, the aim must be to maintain uniform and low rates. ARTICLE 96. All railways, including those not serving purposes of public communication, must accede to requirements of the Realm made in the interests of national defence. ARTICLE 97. The Realm shall acquire as its property and administer the waterways serving purposes of public communication. When the Realm has taken over the waterways, new waterways serving the purposes of public communication shall not be constructed or extended except by the Realm or with its consent. In administering, extending, or constructing waterways, the Realm shall co-operate with the Lands to safeguard the requirements and development of agriculture and of irrigation. Every waterways administration must permit another inland waterways system to effect a junction with it at the cost of the latter. The same shall apply to the connections between waterways and railways. In taking over the waterways the Realm acquires the right to expropriate, to fix rates, and to administer the river police system. The undertakings of the River Development Companies in regard to the natural waterways of the Rhine, Weser, and Elbe shall be taken over by the Realm. ARTICLE 98.