But heres a slightly different slant on it, from the Manx Government's own website......
"The Isle of Man has a special relationship with the European Union, set out in Protocol 3 to the United Kingdom's Treaty of Accession. The text of Protocol 3 is reproduced below. Under this special relationship the Island is neither a Member State nor an associate member of the European Union. It is also worth emphasising that, although the Island's relationship with the EU is through the UK, the Isle of Man is an internally self-governing dependent territory of the Crown and is not part of the UK".
http://www.gov.im/cso/externalrelations/eu.xml
Like I said. Complicated.
"I am a foreign national. What are the requirements if I want to come and live on the Isle of Man?
The admission of foreign nationals is regulated by the Isle of Man Immigration Rules. The Rules lay down the requirements for the entry and stay of foreign nationals in the Isle of Man. The Isle of Man Rules, whilst not identical to the United Kingdom (UK) Rules, are based on the UK Rules and are very similar. However, they are not identical and there are some provisions in the UK Rules that do not apply here and some in the Isle of Man Rules that do not apply in the UK. There are also, as in the UK, provisions in the Rules that apply only to Commonwealth citizens. It is important that people interested in emigrating to the Isle of Man check to see what the requirements are as it may be that an entry clearance is required. Without the necessary entry clearance the passenger may be refused entry to the United Kingdom or the Isle of Man".