Which legal provision enabled illiterate white people to retain their voting rights in the South after the civil war? Black codes. Grandfather clause. Jim Crow laws. Poll tax.

The legal provision that enabled illiterate white people to retain their voting rights in the South after the Civil War was the **Grandfather clause**. This clause allowed individuals to vote if their grandfathers had been eligible to vote before the Civil War, effectively exempting many white voters from literacy tests and other discriminatory practices that were used to disenfranchise Black voters.