The Nigeria Civil Regulations Part 8.2.1.9 generally provides for issuance of Flight Operations Clearance Certificate (FOCC) and Maintenance Clearance Certificate (MCC) for foreign registered aircraft operating within the Nigerian Airspace . Nig.CARs 8.2.1.9 (b) puts the validity period of the FOCC and MCC at 6months and 8.2.1.9 (c) allows for only one renewal for a maximum period of 6 months.