Ethiopia

Article 21, subsection 4 states:

The disabled, other than those specified under Article 20 (1) hereinabove, and the blind may be registered accompanied by their assistants.

Article 64 states:

…(5) Any elector shall have the right to choose a person who can assist him to mark the ballot paper and put it in the ballot box during the voting process.

(6) Electors who are blind or, otherwise, physically disabled may vote accompanied by assistants of their own choice. 

(7) Illiterate electors shall vote by pressing one of their fingers in the square corresponding to the symbol of the candidature for which they want to vote, after dipping it in the ink made available for this purpose...

Excerpts from the Proclamation to make the Electoral Law of Ethiopia Conform with the Constitution of the Federal Democratic Republic of Ethiopia No. 11/1995 (1995, last amended 2005)