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An exclusive right, or exclusivity, 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. Exclusive rights are a form of monopoly.
Exclusive rights can be established by law or by contractual obligation, but the scope of enforceability will depend upon the extent to which others are bound by the instrument establishing the exclusive right; thus in the case of contractual rights, only persons that are parties to a contract will be affected by the exclusivity.
Exclusive rights may be granted in property law, copyright law, patent law, in relation to public utilities, or, in some jurisdictions, in other sui generis legislation. Many scholars argue that such rights form the basis for the concepts of property and ownership.
Privately granted rights, created by contract, may occasionally appear very similar to exclusive rights, but are only enforceable against the grantee, and not the world at large.
A "prerogative" is in effect an exclusive right. The term is restricted for use for official state or sovereign (i.e., constitutional) powers.