Palestine now member of UNESCO

I am unclear as to when there became a state called Palestine. If they are not a state how could they become a member of UNESCO?

General Conference admits Palestine as UNESCO Member State

Palestine’s entry will bring the number of UNESCO’s Member States to 195.

The vote was carried by 107 votes in favour of admission and 14 votes against, with 52 abstentions.


Admission to UNESCO for states that are not members of the United Nations requires a recommendation by the Organization’s Executive Board and a two thirds majority vote in favour by the General Conference of Member States present and voting (abstentions are not considered as votes).
FULL TEXT

That answers my question.