Statutory Instrument 81 of 2021. Public Health (COVID-19 Prevention, Containment and Treatment) (National Lockdown) (No. 2) (Amendment Order, 2021 (No. 18)by Government of Zimbabwein Legal - The Lawon Posted on April 9, 2021 Statutory Instrument 81 of 2021. Public Health (COVID-19 Prevention, Containment and Treatment) (National Lockdown) (No. 2) (Amendment Order, 2021 (No. 18)