Excerpted from Rotary International Bylaws:

16.070. Qualifications of a Governor-nominee.
Unless specifically excused by the board, no person shall be selected as nominee for governor unless the Rotarian has the following qualifications at the time of selection.

16.070.1. Rotarian in Good Standing.
The Rotarian must be a member in good standing of a functioning club in the district.
16.070.2. Rotarian Maintaining Full Qualifications of Membership.
The Rotarian must have full qualifications for such membership in the strict application of the provisions therefor, and the integrity of the Rotarian’s classification must be without question.
16.070.3. Rotarian’s Qualification as Past President of Club.
The Rotarian must have served as president of a club for a full term or be a charter president of a club having served the full term from the date of charter to 30 June, provided that this period is at least six months.
16.070.4. Rotarian’s Ability to Fulfill Duties of Governor.
The Rotarian must demonstrate willingness, commitment, and ability, physically and otherwise, to fulfill the duties and responsibilities of the office of governor as provided in section 16.090.
16.070.5. Rotarian’s Certification of Qualifications.
The Rotarian must demonstrate knowledge of the qualifications, duties, and responsibilities of governor as prescribed in the bylaws and submit to RI, through its general secretary, a signed statement that the Rotarian understands clearly such qualifications, duties, and responsibilities.  Such statement shall also confirm that the Rotarian is qualified for the office of governor and willing and able to assume the duties and responsibilities of that office and to perform them faithfully.
16.080. Qualifications of a Governor.
Unless specifically excused by the board, a governor at the time of taking office must have attended the international assembly for its full duration, been a member of one or more Rotary clubs for at least seven years, and must continue to possess the qualifications in section 16.070.