Section 21 of the Civil Aviation Act provides that the Authority shall carry out its functions on cost recovery basis and may impose fees which may be reviewed, for the services of the Authority, including authorisations, approvals, inspections and for the issue and renewal of permits, licences and certificates, and shall maintain and publish a schedule of all such fees that it may impose. NCAA Fees and Charges considers the cost for processing of applications and rendering of services; the changes in the national economic indices and benchmarked against international best practices