Ownership determines which nation (if any) receives the resources generated in the hex as well as the amount of resources generated.

Home Territory

Consisting of all hexes fully under control of a nation (player or NPC), Home Territory provides a percentage of its resources to the owner nation. Home Territory hexes can be traded or surrendered to other nations, such as in a peace treaty. Such deals must be submitted to the GM for approval before they can take effect.

Uncontrolled Territory

Hexes that are not under the control of any player or NPC are Uncontrolled. They do not generate any resources for any nation. They can be moved through without extra penalty. In order to gain access to their resources, they must be Annexed. Once annexed  their starting control varies from 50% (if the locals fight you) to 75% (if they don't).

Occupied Territory

Occupied hexes deprive the original hex owner of all resource production faciities and income from the hex and give 50% of the resources and 100% of its income to the occupying nation. The resource production can be upgraded as with all your areas.

In order to occupy an area:

1. You must be at war with the previous owner of the area
2. The hex must be controlled by the occupying nation
3. You MUST mention this in your orders-sheet

Occupying an area costs $ 5,000, 5 supplies, and 5 ammo per area, to represent the needed occupation force. These costs must be payed each turn until you have officially annexed the area, using the regular annexing way, with the exception that no units to oppose you will be formed if your 2nd die-roll is too low. Once you've annexed an area previously owned by another nation your control starts at 75%. If you have occupied multiple areas, but not want to pay for all of them, mention this in notes to GM section. The occupying nation's level of control (and thus its resource production) starts at 50% and is subject to the regular control-rules as goes for all areas.  At least 1 unit needs to remain in the hex until it's annexed and you need to pay the occupation costs. As soon as you don't pay them anymore the local population will form militia's and retake the area. 

Needless to say that the previous owner of an area which is occupied by another nation will not receive any of it's income.

An Occupation will end automatically if the original owner moves ground forces into the hex, after which you don't need to pay the occupation-costs anymore

The costs for occupying an area MUST be placed on the Trade-Tab and sent TO GM, or the people in that area will rise up.