DEPARTMENT OF SECURITIES — ADMINISTRATIVE ORDERS All official acts taken by the Deputy Administrator of the Oklahoma Department of Securities within the scope of his authority during the time the Deputy Administrator was a de facto officer of the State by reason of his appointment to said position prior to his 30th birthdate as required by 71 Ohio St. 10 [71-10] (1971), are valid as to third persons and the public. The Attorney General has considered your request for opinion on the following question: "Are administrative Orders and other administrative functions which are signed, effected, transacted, and undertaken by the Deputy Administrator of the Oklahoma Department of Securities under the authority granted him by the Oklahoma Securities Act, valid and binding Orders and actions, even if the Deputy Administrator, while engaging in the aforementioned activities, is under 30 years of age?" You relate in your letter that you were appointed Deputy Administrator of the Oklahoma Department of Securities prior to your 30th birthday. Qualifications for the position of Administrator of the Department of Securities are established by provisions of 71 Ohio St. 9 [71-9] (1971). One requirement therein prescribed is that the Administrator be at least 30 years of age. Title 71 Ohio St. 10 [71-10] (1971) provides for the designation of a Deputy Administrator by the Administrator, with the approval of the Securities Commission, and establishes the same qualifications for the position of Deputy Administrator as for that of Administrator. A State officer de facto has been defined as one in possession of his office and discharging its functions under color of authority or title derived from irregular, informal, or defective appointment or election. 81 C.J.S. States, 100. It is apparent from the facts you relate that your appointment as Deputy Administrator was defective and therefore invalid to constitute an appointment as a de jure officer for the reason that a particular statutory requirement to qualify for the position was not met. It is also apparent, however, that you would come within the definition of a de facto officer above-cited. The general rule is that acts of a state officer de facto are as valid as those of an officer de jure insofar as they concern the general public and rights of third persons until his title to office is adjudged insufficient, and such officer's authority may not be collaterally attacked or inquired into by third persons affected. The practical effect of the rule is that there is no difference between the acts of de facto and de jure officers so far as the public and third persons are concerned. 63 Am.Jur.2d Public Officers and Employees, 518. The de facto doctrine evolved from a necessity to protect the interests of the public and individuals involved in the official acts of persons exercising the duty of an officer without actually being one in strict point of law. The doctrine rests upon the principle of protection of the public and third persons and not to protect or vindicate the act or rights of the particular de facto officer or the claims or rights of rival claimants to the particular office. The landmark case in Oklahoma endorsing the general rule as to validity of official acts of a de facto officer is Morford v. Territory, Okl.,