[Imports] russian municipality code classification import

[Legale Legage]

Hi everybody. I'm working on some data geoanalitics at the moment. For this
I used Russian municipality bounds osm data. I wonder that there is no
OKTMO code saved. OKTMO is an official classification of the Russian
municipality by it's location. Literally OKTMO is All-Russian
classification of territories of municipalities. Federal Statistics Service
is responsible for it.
For my own purposes I have made geojson file with 2 groups of russian
administrative units with matched OKTMO codes. Municipality level 6 and
level 8.
I would like to import this very useful data to the OSM.
What should I do?

Thank you.

Sincerely,
Isaev Ruslan
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