The Senate (not the judiciary) is the sole judge of a senator's qualifications. During its early years, however, the Senate did not closely scrutinize the qualifications of its members. As a result, four senators who failed to meet the age requirement were nevertheless admitted to the Senate: Henry Clay (aged 29 in 1806), John Jordan Crittenden (aged 29 in 1817), Armistead Thomson Mason (aged 28 in 1816), and John Eaton (aged 28 in 1818).