The Social Democratic Labor Party of Lithuania's presidium on Wednesday decided that the party should join the new ruling coalition.
Following negotiations that lasted three and a half hours, the party leader Gediminas Kirkilas said he received the mandate to sign a coalition agreement, after 20 presidium members voted in favor and three abstained.
A coalition agreement is expected be signed on Friday.
Following the meeting, the SDLP leader refused to tell journalists under what conditions the party agreed to sign a coalition agreement.
"Today, we also received certain other proposals [that] we still have time to discus," Kirkilas said without elaborating.
He only hinted that the new proposals were related to posts and program issues.
But if Speaker of the Seimas Viktoras Pranckietis is not removed next Tuesday, the coalition agreement will cease to be in effect, Kirkilas said.
"As I said, it's not our priority but a vote on the Seimas speaker will take place on Tuesday, probably. It's an agreement matter. If the vote fails, then it means the agreement is not valid," the SDDP leader said.
That was also confirmed by Ramūnas Karbauskis, leader of the Lithuanian Farmers and Greens Union (LVŽS), who also attended the SDDP presidium meeting.
Karbauskis also expressed hope that "the Seimas speaker will make his own decision."
Meanwhile, Pranckietis has said numerous times he would not resign.
The LVŽS started overhauling the ruling coalition following the presidential election earlier this year, and if the party, the SDDP, the Order and Justice party and the Electoral Action of Poles in Lithuania – Christian Families Alliance form a coalition, it will have 76 votes in the Seimas.