The special election will be held from 6 a.m. until 10 p.m. Sept. 24. Students can vote in the special election using the online voting system accessed through Student Central.
Speaker of Congress Tony Larson said all three seats are in graduate student districts.
Larson said two vacancies are in District 5, which is composed of the graduate programs for the School of Information and Library Science and the College of Arts and Sciences.
The other empty seat is located in District 2, which includes the graduate programs for the schools of Education, Social Work and Journalism and Mass Communication.
Board of Elections Chairman Brian Fauver said an interest meeting for prospective candidates will be held at 7 p.m. Sept. 10 in the student government offices of the new Student Union.
Fauver said the interest meeting will help introduce potential candidates to the world of Student Congress.
"The interest meeting will help me get to know who's running and help make sure that each candidate has a clear understanding of the student government general election laws," he said.
To get their names on the ballot, prospective candidates must attend the interest meeting and gather 10 signatures from their constituents to be turned in by Sept. 17 to the elections board.
Daum said the special election is essential to Student Congress, and she stressed the importance of filling the remaining seats.