I was born in Russia, but have lived abroad since the age of 2. I have visited Russia many times in the past, before and after I was 18, but never for longer than about 1.5 months. I only hold an external passport ('Zagranpassport') from Russia, and am not registered in any location or residence within the Russian Federation.
My question is regarding the maximum time I can spend in Russia continuously and within a year before I would have to register with the Voenkomat, the administration responsible for calling up young men to serve in the military. As far as I understand this is 90 days.
Thus, would it be possible to 'visit' Russia for 88 days, fly out for a few days, and then return, repeating the process, without ever registering temporarily or permanently, nor applying for an internal passport?
I understand that not having an internal passport vastly limits your rights, like to free emergency healthcare, or receiving a driving licence, or opening most bank accounts, or working in Russia.
Would there be any additional documentation that I would need to carry on me that shows my permanent residence in the UK to show to officials in Russia in case of questioning?
N.B. I despise the idea of avoiding the draft and would have happily completed the military draft and registered properly if there was not a forced vaccination upon being conscripted.
Thank you for your help.