Mr. Fintan Towey:

The obligation in the first instance rests with the travelling passenger but the airline at the point of boarding checks that each passenger has a receipt indicating completion of the passenger locator form and a negative test unless the person declares himself or herself to be exempt and this is confirmed by the passenger locator form receipt. That test by the carriers at the point of boarding is for a negative test and is the line of defence carried out by carriers. The first line of defence is-----