Who is allowed to install and run a pub brewery?

This question has to be answered for each country individually, due to the fact that laws and provisions vary from state to state. In general most member countries of the EU or the WTO allow an installation and operation of a pub brewery without special governmental approvals. However, certain deviating regulations may have to be considered. 

In most countries hotels and restaurants are allowed to run a pub brewery based on an individual governmental approval.