Sources means the various ways in which the law in the Singapore legal system can come into being and be given recognition and effect in the Singapore courts. Which is the most important source of Singapore laws, is it statutes made by Parliament or decisions made by judges in the Singapore courts? Statute law and case law, which has more superior force? Rules made by Singapore Parliament are either direct or indirect. What are the direct rules? What are the indirect rules? Can modern legal textbooks be accepted as works of legal authority in Singapore?