How do you obtain the ark upgrade Comprehensive Environmental Regulations?

Solution 1:

You can't buy the 12% reduction in any mode that lets you get them into your Ark for continuous/multiplayer. The best you can buy is Environmental Regulations (-10% Eco building maintenance) from NPCs. However, you could stack this in the one-star upgrade row with Low Wage Regulations (-8% building maintenance) for an 18% total reduction.

Solution 2:

it is possible to get the 12% in continuous from missions random missions you cannot get them from shops at least i have yet to see them but i just got one from shamus green after i built his monument by doing a mission 12% maintenance on all eco buildings then i have a 1 star 10% and a 1 star 8% from all for a total of 30% maintenance reduction on all eco buildings im hoping to get a 12% from Tycons when i make the monument for them and get 30% on them to OP much :)