Page "Twenty-second Amendment to the United States Constitution" Paragraph 60

While it is clear that under the Twelfth Amendment the original constitutional qualifications of age, citizenship, and residency apply to both the President and Vice President, it is unclear whether a two-term president could later serve as Vice President.

Some argue that the Twenty-second Amendment and Twelfth Amendment bar any two-term president from later serving as Vice President as well as from succeeding to the presidency from any point in the United States presidential line of succession.

Others contend that the Twelfth Amendment concerns qualification for service, while the Twenty-second Amendment concerns qualifications for election, and thus a former two-term president is still eligible to serve as president.

The practical applicability of this distinction has not been tested, as no former president has ever sought the vice presidency, and thus the courts have never been required to make a judgment regarding the matter.