Law on knife in Rusia, Byelarus and Mongolia

[Okruch]

Hello everyone!

I am resident of Poland, and i am going to do some trekking in Mongolia next year.

Does anybody know any limitations that I can expect from custom/border service and police of Belarus, Russia and Mongolia?? Is owning of 6-in blade knife prohibited in any of those countries??

Thanks a lot!!


P.S. Correct my English if necessary.