Kan. Admin. Regs. § 49-12-3
A ballot will be mailed to an individual eligible to vote upon notification to the commissioner in writing of his inability because of sickness, physical disability, geographical location due to his employment, leave of absence granted by the employer, or vacation granted by the employer, the same making it impossible for him to be physically present at the time of the election. This ballot shall be mailed by the voter to the address of the labor commissioner and the envelope containing the ballot will be opened at the time of the counting of the ballots and placed in the ballot box. Such ballots must be in the commissioner's office at least twenty-four (24) hours prior to the election or delivered to the election supervisor before the closing of the polls at the place of balloting in order to be counted. Whenever a voter at an election states under oath that he is physically unable or because of his inability to read or write that he cannot mark his ballot, the observers may assist him in the marking of the ballot.
Kan. Admin. Regs. § 49-12-3