The word license simply means to give permission. License can also be defined as an authorization by licensor to use the licensed material by the licensee. A license may be granted by a party called licensor to another party called licensee as an element of an agreement between those parties.
In particular a license may be issued by authorities, to allow an activity that would otherwise be forbidden. It may require paying a fee and/or proving a capability. The requirement may also serve to keep the authorities informed on a type of activity, and to give them the opportunity to set conditions and limitations.
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