5The officers of each Commission shall include, as assessors, the following persons—
(a)in the case of the Commission for England, the Registrar General for England and Wales and the Director General of Ordnance Survey,
(b)in the case of the Commission for Scotland, the Registrar General of Births, Deaths and Marriages for Scotland and the Director General of Ordnance Survey,
(c)in the case of the Commission for Wales, the Registrar General for England and Wales and the Director General of Ordnance Survey,
(d)in the case of the Commission for Northern Ireland, the Registrar General of Births and Deaths in Northern Ireland, the Commissioner of Valuation for Northern Ireland and the Chief Electoral Officer for Northern Ireland.