§ 3. Qualifications for holding office 1. No person shall be capable of holding a civil office who shall not, at the time he shall be chosen thereto, have attained the age of eighteen years, except that in the case of youth boards, youth commissions or recreation commissions only, members of such boards or commissions may be under the age of eighteen years, but must have attained the age of sixteen years on or before appointment to such youth board, youth commission or recreation commission, be a citizen of the United States, a resident of the state, and if it be a local office, a resident of the political subdivision or municipal corporation of the state for which he shall be chosen, or within which the electors electing him reside, or within which his official functions are required to be exercised, or who shall have been or shall be convicted of a violation of the selective draft act of the United States, enacted May eighteenth, nineteen hundred seventeen, or the acts amendatory or supplemental thereto, or of the federal selective training and service act of nineteen hundred forty or the acts amendatory thereof or supplemental thereto. § 10. Official Oaths Every officer shall take and file the oath of office required by law, and every judicial officer of the unified court system, in addition, shall file a copy of said oath in the office of court administration, before he shall be entitled to enter upon the discharge of any of his official duties. An oath of office may be administered by a judge of the court of appeals, the attorney general, or by any officer authorized to take, within the state, the acknowledgment of the execution of a deed of real property, or by an officer in whose office the oath is required to be filed or by his duly designated assistant, or may be administered to any member of a body of officers, by a presiding officer or clerk, thereof, who shall have taken an oath of office. An oath of office may be administered to any state or local officer who is a member of the armed forces of the United States by any commissioned officer, in active service, of the armed forces of the United States. In addition to the requirements of any other law, the certificate of the officer in the armed forces administering the oath of office under this section shall state (a) the rank of the officer administering the oath, and (b) that the person taking the oath was at the time, enlisted, inducted, ordered or commissioned in or serving with, attached to or accompanying the armed forces of the United States. The fact that the officer administering the oath was at the time duly commissioned and in active service with the armed forces, shall be certified by the secretary of the army, secretary of the air force or by the secretary of the navy, as the case may be, of the United States, or by a person designated by him to make such certifications, but the place where such oath was administered need not be disclosed. The oath of office of a notary public or commissioner of deeds shall be filed in the office of the clerk of the county in which he shall reside. The oath of office of every state officer shall be filed in the office of the secretary of state; of every officer of a municipal corporation, including a school district, with the clerk thereof; and of every other officer, including the trustees and officers of a public library and the officers of boards of cooperative educational services, in the office of the clerk of the county in which he shall reside, if no place be otherwise provided by law for the filing thereof. § 30. Creation of vacancies 1. Every office shall be vacant upon the happening of one of the following events before the expiration of the term thereof: d. His ceasing to be an inhabitant of the state, or if he be a local officer, of the political subdivision, or municipal corporation of which he is required to be a resident when chosen; h. His refusal or neglect to file his official oath or undertaking, if one is required, before or within thirty days after the commencement of the term of office for which he is chosen, if an elective office, or if an appointive office, within thirty days after notice of his appointment, or within thirty days after the commencement of such term; or to file a renewal undertaking within the time required by law, or if no time be so specified, within thirty days after notice to him in pursuance of law, that such renewal undertaking is required. The neglect or failure of any state or local officer to execute and file his oath of office and official undertaking within the time limited therefor by law, shall not create a vacancy in the office if such officer was on active duty in the armed forces of the United States and absent from the county of his residence at the time of his election or appointment, and shall take his oath of office and execute his official undertaking within thirty days after receipt of notice of his election or appointment, and provided such oath of office and official undertaking be filed within ninety days following the date it has been taken and subscribed, any inconsistent provision of law, general, special, or local to the contrary, notwithstanding.