They will have at their disposal 28 days to test the tires that will in Formula 1 entered next year with the new rules of the year 2022. They need to have teams for that custom race cars, but one team is not on the list Pirelli.
Testing new products are spread throughout this season Formula 1. Tests are expected to take place every month where she will participate one or more teams. However, we are looking in vain for a team here Williams. The reason why the team from Grove will not participate in the test of new tires has not been stated, but it is assumed that the team cannot prepare custom car.
If this is indeed the case, it may be financial reasons teams. But maybe they will v Grove later in the year saw an opportunity to participate in one of the aforementioned tire tests Pirelli, but it doesn't look like that at the moment.