15th Amendment: Section 1. The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account o

15th Amendment: Section 1. The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude. Section 2. The Congress shall have power to enforce this article by appropriate legislation. The 19th Amendment has identical language for "on account of sex", the 24th Amendment has "by reason of failure to pay a poll tax or any other tax", the 26th Amendment has "on account of age" for 18 years and older. Like many other things in the Constitution, the constitutional text defines the general principle and the power of the federal government to enforce it, and normal legislation establishes the actual enforcement mechanisms.