This Advisory Circular is issued to provide information and guidance on health, safety and environmental measures required of all Approved Training Organisation (ATO) Certificate holders to restart training activities post COVID-19 lockdown hitherto in place as a result of the COVID-19 pandemic. 1. General Information and considerations Following the declaration of COVID-19 as pandemic by the World Health Organisation(WHO) on 11th March, 2020, the Federal Governments placed restrictions on movement, closure of borders, and ban on international travels including the cancellation of domestic flight operations except essential and emergency flights in line with the guidelines and other associated Air Operators Letters (AOL) issued by the Authority.