How long is Nigeria's green card valid?

After obtaining a work visa and arriving in Nigeria, foreign workers need to apply for a long-term residence permit and a green card at the Nigerian Immigration Bureau within 3 months (valid for 1 year, and need to be updated after expiration).

Valid identification of the applicant (i.e. the client): passport, copy of resident ID card, Nigeria long-term residence permit (commonly known as Nigerian green card).