Before flight all passengers must verbally certify that they have not tested positive for COVID-19 in the last 14 days and have not had close contact with anyone who tested positive for COVID-19 in the last 14 days. Additionally they will not have a temperature above 100.3꙳ or have difficulty breathing, cough, sore throat or loss of taste or smell. 

By boarding the aircraft you agree to wear a mask for the safety of the crew and other passengers for the duration of the flight. While eating, drinking or as required by an emergency you may remove the mask. The pressurization configuration of the LearJet flows from the rear of the aircraft and exits at the crewmembers feet. It is because of this the pilots are able to fly without a mask and not endanger the passengers.