Prime Minister Ranil Wickremesinghe will meet the main decision-making bodies of the party to make a final decision on the Opposition Leader's post.
Wickremesinghe is also expected to meet Sajith Premadasa to arrive at a final solution.
However, UNP General Secretary Akila Viraj Kariyawasam has already informed Speaker Karu Jayasuriya that Wickremesinghe is the party's choice for the opposition leader's post.
However, 46 MPs have written to the speaker requesting to appoint Premadasa as the Opposition Leader.
Despite Kariyawasam's letter, Wickremesinghe has indicated to his close allies that he will discuss the matter with Premadasa and the key decision-making bodies of the party.