ediks,
I thought the NCAA are supposed to have stopped issuing validations based on foreign licences so he'd have required a Nigerian Licence which involved sitting for the air law exam, the MD-83 type technical, processing his Licence (ie waiting for the NCAA to issue it, not exactly a speedy process) then doing the number of required sectors during line training
The NCAA still issues validations based on foreign licences and it requires at least 2 revalidations before considering an application for a Nigerian licence. All that is required for the validation is for the foreign licence to be verified, the Nigerian Air Law exam to be passed and an NCAA medical certificate issued. The whole process can be completed in a few weeks.