The trustees of a salary-related pension scheme must ensure that they have in place a schedule of contributions at all times. This must be agreed with the participating employers and must show separately the contributions payable by the employers and scheme members. If the trustees and employers have agreed a recovery plan, the schedule should also show the additional contributions that are required from the employers. The scheme actuary must certify the schedule. The trustees are required to revise the schedule periodically, in particular after an actuarial valuation.