Only a physically disabled or illiterate voter can receive assistance in preparing his or her ballot from one of the following: any elector who is qualified to vote in the same county or municipality as the disabled or illiterate voter; an attendant care provider or a person providing attendant care; or the mother, father, grandparent, aunt, uncle, brother, sister, spouse, son, daughter, niece, nephew, grandchild, son-in-law, daughter-in-law, mother-in-law, father-in-law, brother-in-law, or sister-in-law of the disabled or illiterate voter. The person giving assistance to the disabled or illiterate voter in preparing the ballot must sign the oath printed on the same envelope as the oath to be signed by the voter. In addition, no person may assist more than ten voters in any election in which there is no federal candidate on the ballot. If a federal candidate appears on a ballot, a person can assist an unlimited number of voters in that election.