The Welsh National Water Development Authority (Establishment and Constitution) (Variation) Order 1977
1977年威尔士国家水资源开发局（机构和章程）（变更）令

The Welsh National Water Development Authority (Change of Name) Order 1978
1978年威尔士国家水资源开发局（更名）令

The Welsh National Water Development Authority (Regional Land Drainage Committee) Order 1973
1973年威尔士国家水资源开发局（区域土地排水委员会）令

The Welsh National Water Development Authority (Mid-Glamorgan) (Extension of Operation of Byelaws) Order 1977
威尔士国家水资源开发局（格拉摩根中部）（延长条例的实施）1977年命令