I don’t know if it’s still in effect. But here in the U.S. regarding auto manufacturers they had to provide parts for any car they made for 20 years!
That seemed to be pretty much the industry standard for most industries back in the day. You could still order parts for a 1971 MCI Console in 1988, same for SSL, API, Neve and the like. You didn’t have to scavenge for parts like you do now for small format digital consoles.
I remember vividly when that started to change. I was talking to my Dad about car parts and the 20 year law. He said, pretending to be a sincere salesman “Oh we didn’t stop making parts, it’s just on back order.”