I ask you once again what does the term exclusion zone mean to you? To me it means that you ensure that you stay out of it unless you absolutely have to, in which case you call on VHF Channel 16 and get permission to enter it stating your reasons for doing so.

The number of times is irrelevant.

The reason for entering is irrelevant.

Rules, Guidelines, Laws - all exist - for example the greatest difference between offshore operations in the North Sea exist between the operations on the UKCS and the NCS - In the UK a mixture of "Guidelines" and Laws are used, in the Norwegian Sector Rules are enforced, all of them introduced as Law by Royal Decree at the request of the Norwegian Petroleum Directorate.

I would imagine that in Russian waters fairly strict laws will govern what rules are to be enforced. Innocent right of passage is governed and guaranteed under International Maritime Law - but innocent right of passage means a ship in transit through territorial waters or through the waters established by a country as being inside their EEZ, that ship has no right to linger and cause trouble.

In the case of the unauthorised inflatables attempting to get people aboard the installation as shown in the clip linked in Keith A of Hertford's post of 02 Oct 13 - 04:24 AM - they would constitute a threat and a safety violation in any OIM's book on any offshore installation anywhere in the world.