Tn this proceeding, in the nature of quo warranto, Evo Butera, hereinafter referred to as the plaintiff, seeks to test the right of the defendant to occupy the office of assessor of the city and town of Danbury. The facts are not in dispute. Special Acts 1935, No. 327, § 1, provides that the members of the board of finance of the town of Dan-bury, the members of the board of estimate and taxation of the city of Danbury, the mayor of the city and the first selectman of the town shall con *301 stitute a joint tax board for certain defined purposes, among which is the appointment of an assessor by a majority vote. 22 Spec. Laws 185. The act provides further that no member of the joint tax board, city board of estimate and taxation or town board of finance, with the exception of the mayor and the first selectman, shall hold any public office, either elective or appointive, in the city or town government. Id., 186. A meeting of the joint tax board was held on May 14, 1957, for the purpose, inter alia, of appointing an assessor. The board comprised fourteen members. Three of them besides the mayor and first selectman held other positions in the city or town government. Before a vote was taken on the appointment of an assessor, the right of these three to vote was challenged. The chairman, over objection, permitted them to vote. Seven votes were cast for the defendant and seven for the plaintiff. The chairman, pursuant to express authority in the special act, broke the tie by casting a second vote for the plaintiff and declared him elected. Exclusive of the votes cast by the challenged members and the second vote by the chairman, a majority of the votes were cast for the defendant.
It is conceded by both parties that the determination of the case turns on the status of one of the challenged members, Henry Rocano, who voted for the plaintiff and thereby brought about the tie vote which made it possible for the chairman to cast the deciding vote. Rocano was appointed to the board of estimate and taxation of the city while he was a member of the board of education of the town. At the time of the meeting on May 14, 1957, he purported to be a member of both boards. A contention that Rocano’s position on the board of education was not *302 a public office within the meaning of the statute was advanced by the plaintiff in the trial court but was abandoned and is not before us. The position of the plaintiff is that Rocano was a qualified member of the joint tax board and eligible to vote at the meeting of May 14,1957, in spite of the fact that he had not formally resigned his position on the board of education. This is on the theory that when he became a member of the board of estimate and taxation, and so qualified for membership on the joint tax board, the statutory prohibition against holding other public office operated to vacate his position on the board of education. The defendant, on the other hand, argues that the statute deals with qualification for membership on only the boards specifically designated and any disqualification arising from the prohibition affects only eligibility to an office named in the statute and not to any other office held by the person. This would mean that Rocano was disqualified from membership on the board of estimate and taxation and so on the joint tax board. The defendant, in his brief, says that “the precise, narrow question presented in this case [is] whether disqualification runs to the second office held and not the first office when the statute in issue establishes membership criteria for the second office.”
It has long been firmly settled at common law that a person may not at one and the same time rightfully hold two offices which are incompatible, and when he accepts and qualifies for a second office which is incompatible with the first, he vacates, or by implication resigns, the first.
State ex rel. Schenck
v.
Barrett,
In
People ex rel. Henry
v.
Nostrand,
supra, a constitutional provision declared that sheriffs should hold no other office. It was held that one who held office as a commissioner to lay out and construct
*304
certain public highways vacated that office when he accepted the office of sheriff, to which he had been elected. In
State ex rel. Camp
v.
Herzberg,
supra, a statute creating the office of chairman of a city board of commissioners declared that no member of the commission should hold any office of profit or trust under the laws of any state. It was held that one elected to the office of chairman of the board of commissioners, upon acceptance and entry upon the duties of that office, ipso facto, without resignation, vacated the office he held as a member of the board of trustees of the University of Alabama. In
People ex rel. Myers
v.
Haas,
supra, 287, a constitutional provision declared that no judge or clerk of any court should have a seat in the General Assembly. It was held that one who was a member of the General Assembly as a senator vacated that office when he accepted the office of clerk of a municipal court. In each of these instances, the constitutional or statutory provision referred to the qualification of a person to hold the second office, and the disqualification was held to operate as a resignation of the first office. In
Magie
v.
Stoddard,
The legislature must be presumed to have been aware of our interpretation of the statute involved
*305
in the
Magie
case, supra, when it incorporated in the statute here the prohibition against the holding of other public office. The General Assembly, and those who frame its legislation, must always be presumed to be familiar with settled rules of statutory construction and the interpretation the courts have placed upon legislation which has been enacted.
Herald Publishing Co.
v.
Bill,
The defendant claims that the opinion in
State ex rel. Oakey
v.
Fowler,
The trial court should have sustained the claim of the plaintiff that he was duly appointed to the office of assessor for a six-year period commencing July 1,1957, and is legally entitled to the office, and that the defendant failed to establish title to the office.
There is error, the judgment is set aside and the case is remanded with direction to render judgment in favor of the plaintiff, decreeing that the defendant be ousted and altogether excluded from the office of assessor of the city and town of Danbury.
In this opinion the other judges concurred.
