Park Chan-dae, second from left, floor leader of the main opposition Democratic Party of Korea, speaks during a policy meeting at the National Assembly in Seoul on Dec. 26. Yonhap

The main opposition Democratic Party of Korea (DPK) submitted an impeachment motion against acting President Han Duck-soo and reported it to a parliamentary plenary session Thursday.

The decision comes shortly after Han said he will not appoint justices to the Constitutional Court until the rival parties reach a political compromise.

The DPK has vowed to impeach Han unless the acting president approves their appointments, as the opposition-controlled National Assembly is set to vote on their appointment.

If appointed, the three nominees will fill vacancies on the court's nine-member bench, where six justices are currently seated, to deliberate President Yoon Suk Yeol's impeachment trial. By law, at least six votes are required to uphold an impeachment motion.

The DPK plans to put the motion up for a vote during a plenary session on Friday.

By law, an impeachment motion must be put to a vote between 24 and 72 hours after it is reported to a plenary session. (Yonhap)

Acting President Han Duck-soo delivers an address at the government complex in Seoul, Dec. 26. Yonhap