See Below The Steps On How To Become A Registered Engineer In Nigeria:

A registered engineer, as indicated by the engineers code of conduct of 2015 arranged by coren is characterized as somebody who perhaps occupied with investigate, generation, supervision of building development, administration of building exercises or as a planner; or he might be held as a specialist for proficient counsel, review, accreditation arbitration, or be occupied with any mix of these.

This is on the grounds that when you enroll with nse, you will neither sit for a meeting with coren nor will you have to present a point by point specialized report.
Once more, to clear the misinterpretation of who gives you the imperative permit to work on building in nigeria, it is coren.