From cxagents.com:

"United Arab Emirates Passenger Service Charge -AE- (29Jul04)

Please be advised the details of United Arab Emirates Passenger Service
Charge -AE- as follow:
AED 30.00 levied on all passenger departures from Abu Dhabi -AUH-,
Al Ain -AAN-, Dubai -DXB-, and Sharjah -SHJ- charge to be collected
at point of sale and shown separately on the ticket.

Exemptions:
-Infants -Children under 2-.
-Airline crew on duty.
-Transit/transfer passengers continuing travel within 24 hrs.

Above charge applied to tickets issued from 01Aug04 for travel on/after
01Sep04. Thank you for your attention."