The cleanest way to fix this date is to note that only one of the four years lines up with when the Ministry of Road Transport and Highways actually issued the notification, so the other three can be ruled out by their timing alone.
Since 2019 is the only year matching the actual notification date, it is the correct answer.
The years 2018 and 2019 sit right next to each other, which is exactly why they are worth comparing directly, since the difference between not yet mandatory and now mandatory turns on a specific notified date rather than a general trend.
Since the shift from partial, state-level implementation to a firm nationwide mandate happened specifically with the 2019 notification, and 2023 and 2024 are simply too late, 2019 is the year the requirement came into effect.
Therefore, the correct answer is 2019.
Match List-I with List-II 