The Local Government Superannuation Act, 1937, provides for interchangeability of service with preservation of prospective superannuation rights between employment under one local authority, whether the local authorities affected are administering the Act of 1937 or a local Act scheme. Certain authorities administering local Act schemes (in particular the London County Council) have power to admit to participate in the benefits of these schemes staff not employed by local authorities, e.g. staff in the employment of certain educational bodies and of other bodies performing functions of a semi-public character. This staff, not being technically in the employment of local authorities, does not enjoy the rights in regard to interchangeability of service provided for by the Act of 1937. These rules place them in the same position in this respect as employees of local authorities.