Stimstrum is not quite right on this.

It is not even 90 days from your first entering RUS.

A 90 day double entry visa is valid only for the 90 days on the visa (which comes from the dates on the Invitation) whether you are in the RUS or not. You get no credit or extra days for not being in RUS within the visa validity period.

So - if you plan entering and exiting RUS to re-enter and exit later, that second visit must still all be within the original 90 days quoted on the visa/invitation.

If your second visit is planned to extend outside the original 90 days you need a different type of visa - perhaps a Year Multi Entry.

However all Tourist and Business Visas for longer than 90 days have a '90 day out of 180' restriction to visits. This includes Year Multi Entry visa.


Note.
A week ago it was announced here that the 90/180 days will now be monitored by the Border Computors which record your every entry and exit from 'swiping' your passport & visa. In the past it was for the Officer to work out the 90 days in his head.

http://www.themoscowtimes.com/news/a...ed/444051.html

They are fed up with people living here full time on Visas and going on an annual 'visa run'. The 90/180 day rule was introduced 3 or 4 years ago to stop this, but that was still being abused so now it is the computor that will flag up excess period when your passport/visa is swiped on exit.

The consequences of being here outside visa terms and validity would be inconvenience, penalties and denial of future visas for a number of years (I can't remember if it is 5 or 7).

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