Relating to requiring a voter to be affiliated with a political party to vote in that party's primary election or otherwise participate in that party's affairs; creating a criminal offense.

HB 951 requires Texas voters to declare their political party affiliation when registering to vote, adding a new field to voter registration forms. The bill amends election code sections to mandate that applicants include "political party affiliation, if any" on registration applications and adds a perjury warning about false statements. This directly affects voters registering to participate in partisan primary elections or party activities. Providing false affiliation information on the registration form would become a criminal offense under the law. The bill focuses on registration requirements, not voting eligibility or primary election procedures themselves.