Responsibility for governance of the plans, including investment strategy and schedules of contributions, rests primarily with the trustees, some of whom who are appointed by the Group and the remainder by the members in accordance with the rules of each plan.There are five plans in the US, four of which are closed to both new entrants and future accrual, and one of which is closed to new entrants but permit future accrual. The active members are not required to make contributions to the plans.