Vijay Mallya's team won their first podium place at the Belgian Grand Prix

Williams and Force India have been readmitted to the Formula 1 Teams' Association (Fota) after their suspension from the group was lifted.

Their ban was imposed at the height of the budget cap crisis when they broke ranks and applied for unconditional entry into the 2010 championship.

Fota's executive committee says all teams competing in the championship are welcome to join the group.

That means new teams Campos Grand Prix, Manor and US F1 are also eligible.

Earlier in the summer, F1 was faced with the possibility of many of the most high-profile teams withdrawing from the championship in protest at the prospect of budgetary restrictions being imposed on them by motorsport's governing body, the International Motorsport Federation (FIA).

606: DEBATE

But FIA president Max Mosley's original plan for a £40m budget cap was replaced with an agreement to reduce costs to "mid-1990s levels", to be done according to Fota's chosen methods, and with Mosley agreeing not to stand in October's elections.

"The Fota executive committee looks forward to working with the FIA and Commercial Rights Holder to promote a healthy, dynamic and sustainable sport," said an official statement.

"To this end, Fota intends to now enter into open discussion with the Commercial Rights Holder with the wish to confirm arrangements beyond 2012."