Why is the airport tax at some airport charged outside the airfare ticket but instead must be paid at the airport? Example from Uyuni airport
science
hong-kong
estonian-citizen
yerevan
oaxaca
atl
marseille
finnish-citizens
leh-india
mexico
lcy
late-arrival
opo
duty-free
volgograd
argentinian-citizens
quarantine
premium-services
nicop
afghanistan
saw
macau
emiri-citizens
lufthansa
cyclades-islands
japanese-visitors
el-calafate
trans-siberian
slovenia
montenegro