Notwithstanding Section 100, a voter who is unable to personally affix on a petition or paper the information required by Section 100 may request another person to print the voter's name and place of residence on the appropriate spaces of the petition or paper, but the voter shall personally affix his or her mark or signature on the appropriate space of the petition or paper, which shall be witnessed by one person by subscribing his or her name thereon.
Ca. Elec. Code § 100.5