Earl Warren

“ The requirement imposed upon those who reject the poll tax method of qualifying would not be saved even if it could be said that it is no more onerous, or even somewhat less onerous, than the poll tax. For federal elections, the poll tax is abolished absolutely as a prerequisite to voting, and no equivalent or milder substitute may be imposed. Any material requirement imposed upon the federal voter solely because of his refusal to waive the constitutional immunity subverts the effectiveness of the Twenty-fourth Amendment and must fall under its ban. ”

“ The State of Virginia accordingly removed the poll tax as an absolute prerequisite to qualification for voting in federal elections, but in its stead substituted a provision whereby the federal voter could qualify either by paying the customary poll tax or by filing a certificate of residence six months before the election.
It has long been established that a State may not impose a penalty upon those who exercise a right guaranteed by the Constitution. ”

“ Significantly, the Twenty-fourth Amendment does not merely insure that the franchise shall not be 'denied' by reason of failure to pay the poll tax; it expressly guarantees that the right to vote shall not be 'denied or abridged' for that reason. ”