The matters of citizenship and felony convictions are critical factors in determining the eligibility of a person to vote. As such, it is important that the form be structured such that applicants are made to give a deliberate answer on these issues. Check boxes ensure that. A mere signature on a blanket statement of affirmation (most people do not read multiple-line statements before signing) is not sufficient. It's important to get a deliberate response from the applicant on each of these critical items.