In 1946 a new constitution was approved by Westminster and promulgated in Nigeria. Although it reserved effective power in the hands of the Governor-General and his appointed Executive Council, the so-called Richards Constitution (after Governor-General Sir Arthur Richards, who was responsible for its formulation) provided for an expanded Legislative Council empowered to deliberate on matters affecting the whole country. Separate legislative bodies, the houses of assembly, were established in each of the three regions to consider local questions and to advise the lieutenant governors. The introduction of the federal principle, with deliberative authority devolved on the regions, signaled recognition of the country's diversity. Although realistic in its assessment of the situation in Nigeria, the Richards Constitution undoubtedly intensified regionalism as an alternative to political unification.