Wyoming constitution
Article 5: judicial department
Section 8

No person shall be eligible to the office of justice of the supreme court unless he be learned in the law, have been in actual practice at least nine (9) years, or whose service on the bench of any court of record, when added to the time he may have practiced law, shall be equal to nine (9) years, be at least thirty years of age and a citizen of the United States, nor unless he shall have resided in this state or territory at least three years.