When are private jet charter landing and takeoff slots applicable?

jet slotT-Jet ; T-Jet Body Screws · $5.00 ; Riveting Tool · $45.00 ; T-Jet Brush Tension Scale · $40.00 ; Wizz-Jet Rev 2 Top Plates · $3.00This is a air battle themed slot with 5 different landscapes to fly in, hunting down enemy craft. The landscapes are beautifully crafted, showing different