Voting will be done on the basis of secret ballot and simple majority.
If all 359 Conservative MPs vote, Johnson would need at least 180 votes to stay in office.
Boris Johnson was fined after a police investigation for attending some parties held at the Prime Minister’s Residence.
If Johnson loses the vote, the new leader to be chosen by the Conservative Party will also be the UK’s new prime minister and form the government.
If Johnson wins the vote, according to the current rules of the Conservative Party, the same vote cannot be held for 1 year.
For voting, at least 15 percent (54) of the party’s deputies had to make a written request.
This morning, it was announced that the 15 percent threshold for voting had been crossed, but it was not specified how many MPs wanted to vote.