Judicial notice required for domestic laws, treaties, public offices and seals, with courts able to demand reference materials. Section 52 mandates that courts take judicial notice of specified facts without proof-domestic laws (including extraterritorial laws), international treaties and decisions, proceedings of constituent and legislative bodies, seals of courts and authorised seals, Gazette notified appointments and holidays, territorial facts, hostilities involving India, names and officers of courts and advocates, and the rule of the road-while subsection (2) allows courts to consult reference works and to require parties to produce such materials before taking notice.