Oklahomans who want to elect the nominee of a political party in the Primary or Runoff Primary Elections later this year should make sure they are registered in that party no later than March 31, according to Andrea Conner, secretary of the Osage County Election Board.

Changes of political affiliation are prohibited by law during the period beginning April 1 and continuing through Aug. 31 in even-numbered years, Conner said.

Political parties can nominate one candidate per office for the November General Election. If two or more candidates from the same party file for one office, the party nominee is selected at either the Primary or Runoff Primary Election.

Only voters registered in a political party can vote to select that party’s nominees. Voters not registered in a party cannot vote for party candidates in primary elections. Oklahoma recognizes two political parties: Republican and Democrat.

All registered voters, regardless of political affiliation, can vote for any candidate at the November General Election and for state or local questions at any election.

Applications to register to vote or to change political affiliation are available at the Osage County Election Board office, 630 Kihekah Ave.; or at post offices, public libraries, state offices providing public assistance, and State Election Board website, www.elections.ok.gov.