Some of these rules are found in the statutes and regulations themselves and some are found in the common law, which is comprised of legal guidelines based on previous court decisions. (plea.org)
However, driving is also governed by Florida common law, which is created by our judicial system from previous court decisions. (southfloridainjuryaccidentblog.com)
Despite that principle, the current Supreme Court has been willing to revisit and overrule previous court decisions, on issues such as gay rights and the death penalty. (legalblogwatch.typepad.com)