Not any violation of the requirements of a road sign is subject to qualification under Article 12.16. Let me remind you

Article 12.16. Failure to comply with the requirements prescribed by road signs or roadway markings

Failure to comply with the requirements prescribed by road signs or roadway markings, with the exception of cases provided for by other articles of this Chapter, -
shall entail a warning or the imposition of an administrative fine in the amount of one hundred roubles.

This was also pointed out Supreme Court RF (though on a slightly different issue, but the approach is obvious):

PLENUM OF THE SUPREME COURT OF THE RUSSIAN FEDERATION
RESOLUTION of October 24, 2006 N 18 ON SOME ISSUES ARISING FROM COURTS IN THE APPLICATION OF THE SPECIAL PART OF THE CODE OF THE RUSSIAN FEDERATION ON ADMINISTRATIVE OFFENSES

Violation by drivers of the requirements of road signs or markings, which led to the exit to the side of the carriageway intended for oncoming traffic, should also be qualified under Part 3 of Article 12.15 of the Code of Administrative Offenses of the Russian Federation, since this rule is special in relation to Article 12.16 of the Code of Administrative Offenses of the Russian Federation. Such situations may arise, for example, when driving on a road with one lane for each direction as a result of violation of the requirements of road signs: 3.20 "No overtaking", 3.22 "No overtaking for trucks", 5.11 "Road with a lane Vehicle", as well as road markings 1.1. Violation by the driver of the requirements of the road sign 3.1 "Entry is prohibited", which entailed movement in the opposite direction on a road intended for one-way traffic, also forms an administrative offense under part 3 of article 12.15 of the Code of Administrative Offenses of the Russian Federation.

Now let's return to the norm of part 1 of article 12.15, which is just one of such cases (exceptions from article 12.16):

Article 12.15. Violation location rules vehicle on the carriageway, oncoming passing or overtaking

1. Violation of the rules for the location of the vehicle on the carriageway, oncoming passing or overtaking without going to the side of the carriageway intended for oncoming traffic, as well as driving along roadsides or crossing an organized transport or foot column or taking a place in it -
shall entail the imposition of an administrative fine in the amount of five hundred roubles.

By itself, the definition of "rules for the location of vehicles" is not contained in the SDA. But back to clause 9.1 of the SDA

9. Location of vehicles on the roadway

9.1. The number of lanes for trackless vehicles is determined by markings and (or ) signs 5.15.1, 5.15.2, 5.15.7, 5.15.8, and if they are not available, then by the drivers themselves, taking into account the width of the carriageway, the dimensions of vehicles and the necessary intervals between them. At the same time, the side intended for oncoming traffic is considered to be half the width of the carriageway, located on the left, not counting local widenings of the carriageway (transitional-speed lanes, additional lanes for climbing, drive-in pockets of stopping places for route vehicles).

Also, according to the traffic rules, sign 5.15.1 establishes a certain mode of movement - “the direction of movement along the lanes”. That is, as in this case - from the leftmost lane only turn left, from the right - straight. At the same time, it is obvious that it is impossible to turn left from the right - this is the mode of movement in the zone of action of the sign. Can this be considered a rule for the location of vehicles in this place? I think yes. Consequently, the top-starter, having allowed movement straight along the lane on which he could not move like that, but had only to turn left, violated the rules for the location of vehicles in the area of ​​​​this sign and committed an administrative offense under part 1 of article 12.15 of the Code of Administrative Offenses RF.