Saudi Arabia - Six year cap on the residency of foreigners

Saudi Arabia is planning to impose a six-year cap on the residency of foreigners in the country as part of its program to regulate the local labor market. This move will likely affect a large number of Indians working in that country.

Would this be applicable for all types of  workers? I know so many skilled workers who work in Saudi Arabia and they have been there for more than six years. This would be a big change for them. Hopefully this cap might not be applicable for all skilled categories.