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"It Must Be A Northerner First Or We Employ Whiteman" - Ahmadu Bello (1960).
There must be a policy of "A Northern first In Nigeria", Good Positions Must be Occupied By Northerners, And Where there is no qualified Northerner, Nigeria will hire a Whiteman on contract.
If there are no White people available, then the North will Consider other Nigerians only on Contract basis, Not permanent and this policy will continue for the foreseeable future.
This Northernisation of Nigeria which we started in 1952 will ensure that all Important post must be held by Northerners.