delivered the opinion of the Court.
In 1893 the legislature of Washington .provided that only licensed persons should practice dentistry. It vested the authority to license in a board of examiners, consisting of five practicing dentists; and it required that persons desiring to practice should apply to that board and undergo examination before it. Every person of good moral character with a diploma from a reputable dental college was declared eligible; and, if he or she passed the examination, became entitled to a license. Laws of Washington, 1893, c. 55. That statute, with amendments not here material, Laws of 1901, c. 152; has since been continuously in force. It is now embodied in Remington’s 1915 Codes and Statutes of Washington, § 8412 — § 8425. The validity of the statute has been attacked on various grounds; and it has been repeatedly upheld by the highest court of the State. 1
In 1921 Noble brought this suit in the federal court for the Western District of Washington to enjoin the King County prosecuting attorney from proceeding criminally against him for practicing dentistry without a license. Jurisdiction of that court was invoked solely on the ground that rights guaranteed plaintiff by the Federal Constitution were being invaded. The bill charged that these were violated, both because the licensing statute was void and because the board in administering it had exercised its power arbitrarily. The case was heard by three judges upon application for an interlocutory injunction *167 under § 266 of the Judicial Code. It was admitted that plaintiff was of good moral character; that he had a diploma from a reputable dental college; that he had submitted himself to the dental board for examination; that he had been examined, but had not passed the examination; and that, although refused a license, he had persisted in practicing dentistry. The board denied, by its answer, that it had acted arbitrarily in refusing a license; and this charge does not appear to have been further insisted upon.
Plaintiff rested his case solely on the - claim that the statute violated the Federal Constitution. It was conceded that a State may, consistently with the Fourteenth Amendment, prescribe that only persons possessing the reasonably necessary' qualifications shall practice dentistry,
Dent
v.
West Virginia,
The argument is that, since the act does not state in terms what the- scope and character of the examination shall be, arbitrary power is conferred upon the board to grant or withhold licenses. It is pointed out that the statute does not in terms direct that the examination shall relate to the applicant’s qualifications to practice dentistry; that it does not prescribe the subjects upon which applicants shall be examined, or whether profi *168 ciency shall be determined by knowledge of theory or by requiring applicants to demonstrate skill with the tools and materials of the profession; that it does not provide whether the examination shall be oral or written, or what percentages of correct answers shall be required to pass the examination; and that it does not require the keeping of records of the proceedings which could be used for purposes of review. •
What authority the statute purports to confer upon the board is a question of construction. If it purported to confer arbitrary discretion to withhold a license, or to impose conditions which have no relation to the applicant’s qualifications to practice dentistry, the statute would, of course, violate the due process clause of the Fourteenth Amendment. Its construction is a question of state law. Since the case is here on appeal from a federal court, we must consider it,
Davis
v.
Wallace,
The statute provides that the examination shall be before a board of practicing dentists; that the applicant must be a graduate of a reputable dental school; and that he must be of good moral character. Thus, the general standard of fitness and the character and scope.of the examination are clearly indicated. Whether the applicant possesses the qualifications inherent in that standard is a question of fact. Compare
Red “C” Oil Mfg. Co.
v.
North Carolina,
Appellee relied upon
Yick Wo
v.
Hopkins,
Reversed.
Notes
State ex rel. Smith
v.
Board of Dental
Examiners,
