Constitutionalists focsed on basic principles of legal security country that does practise morality and justice as a tool of expanding its authority on investment law22-18 of business including the laws of governing the property portfolio investments for the granting of concession of investment-oriented properties.Under the latter amendment, the legislature was subject to the new practice No.23_17 under which the economic property was classified and the authority of the Algerian agency for the promotion of investment with concessive given contracts No 08_04 that may affect the legal status of the investor on one hand, and the investment climate on the other hand.