Complex sentence: The Iraq National Oil Company would have exclusive operational control of just 17 of Iraq's 80 known oil fields, normally countries do not have this type of exclusivity, leaving two-thirds of known and all undiscovered fields open to foreign control.
Split into simpler sentences: The Iraq National Oil Company would have exclusive operational control of just 17 of Iraq's 80 known oil fields. Normally countries do not have the type of exclusivity that would leave two-thirds of known and unknown fields open to foreign control.