628.Section 413 provides for the modification of transfer or pension instruments. A transfer or pension instrument may be modified at any time after it has come into force by an order made by a Minister of the Crown.  In relation to transfer schemes, a Minister of the Crown may direct that any of the predecessor bodies shall prepare modifications to the scheme in accordance with the terms of the direction.  Before approving any modifications, the Minister will have to consult other parties affected. In the case of instruments relating to pensions, the Minister will have to consult any trustees, managers or administrators of the pension scheme affected.
Commentary on Sections Schedule 32: London Regional Transport pension etc schemes Section 413:   Modification of transfer or pension instruments