Property rights would granted a person or organization an exclusive use for the assets or resources that exist in the country's territory. The government in mixed market economy exist as both regulator and mediator that resolve conflicts regarding who have the legal right over a certain type of property (such as land or buildings).
The congress is able to veto a bill meaning that the bill is not getting passed and therefore shall not be made a law. He makes sure the congress doesn't have too much power by vetoing bills.
