What is a requirement for partisan petitions?

The correct choice highlights that candidates for partisan petitions must be legally qualified and members of a recognized political party. This requirement ensures that those seeking to run for office within a particular party are authentic representatives of that party's interests and values. It helps maintain the integrity of the electoral process by ensuring that only qualified individuals who support the party's platform and comply with its regulations can seek nominations.

This aspect of candidacy is fundamental in a partisan system, as it allows party members to select candidates who align with their political ideology and goals. By ensuring that candidates are registered members, the party can maintain control over its candidates and ensure they are suitable representatives of the party in the election.

The other choices, while they may be procedural or relevant to the overall petition process, do not encapsulate this vital qualification aspect that directly ties into the nature of partisan petitions.