<P> States that have codified constitutions normally give the constitution supremacy over ordinary statute law . That is, if there is any conflict between a legal statute and the codified constitution, all or part of the statute can be declared ultra vires by a court, and struck down as unconstitutional . In addition, exceptional procedures are often required to amend a constitution . These procedures may include: convocation of a special constituent assembly or constitutional convention, requiring a supermajority of legislators' votes, the consent of regional legislatures, a referendum process, and / or other procedures that make amending a constitution more difficult than passing a simple law . </P> <P> Constitutions may also provide that their most basic principles can never be abolished, even by amendment . In case a formally valid amendment of a constitution infringes these principles protected against any amendment, it may constitute a so - called unconstitutional constitutional law . </P> <P> Codified constitutions normally consist of a ceremonial preamble, which sets forth the goals of the state and the motivation for the constitution, and several articles containing the substantive provisions . The preamble, which is omitted in some constitutions, may contain a reference to God and / or to fundamental values of the state such as liberty, democracy or human rights . In ethnic nation - states such as Estonia, the mission of the state can be defined as preserving a specific nation, language and culture . </P> <P> As of 2017 only two sovereign states, New Zealand and the United Kingdom, have uncodified constitutions . The Basic Laws of Israel have since 1950 been intended to be the basis for a constitution, but as of 2017 it had not been drafted . The various Laws are considered to have precedence over other laws, and give the procedure by which they can be amended, typically by a simple majority of members of the Knesset (parliament). </P>

What is the name of the introduction to the constitution