exclusive right

n. right reserved in an exclusive way by a particular person or group; right given by the government to persons to permit or disallow other people from taking specific actions (Law)

In Anglo-Saxon law, an exclusive right is a de facto, non-tangible prerogative existing in law (that is, the power or, in a wider sense, right) to perform an action or acquire a benefit and to permit or deny others the right to perform the same action or to acquire the same benefit. Whilst a "prerogative" is in effect an exclusive right, the term is restricted for use for official state or sovereign (i.e constitutional) powers.
See more at Wikipedia.org...

Noun
1. a right reserved exclusively by a particular person or group (especially a hereditary or official right); "suffrage was the prerogative of white adult males"
(synonym) prerogative, privilege, perquisite
(hypernym) right
(hyponym) easement