The idea of legal security in all legal fields is an important factor in achieving a degree of relative stability of legal relations. In the field of administrative decision, in addition, it contributes significantly and effectively to the stability of various legal centers, with the aim of spreading security and tranquility among the parties to legal relations from public legal persons. Especially, so that these people can act reassuringly on the guidance of the existing legal rules and regulations at the time of their work and arrange their situation in their light without being exposed to surprises or sudden actions issued by the public authorities that would destabilize this tranquility or storm this stability.This idea has been entrenched in Germany since 1961, as the Federal Constitutional Court demonstrated the constitutionality of this idea, and it was internationally recognized by the Court of Justice of the European Community in its 1962 decision, and its decisions regarding legitimate trust, which are very close to the idea of legal security. The European Court of Human Rights emphasized in 1981 the necessity of legal expectation as a requirement for legal security.
waleed hassan hameed alziady (Sat,) studied this question.