In 2008, the FIA introduced the standard engine control unit. The FIA did so to reduce costs, but it also allowed them to enforce the ban on traction control.
However, without standardizing the engine control unit, launch control was banned in 2004. This made me ask myself the following question. If successfully enforcing the ban on traction control required the standardization of the engine control unit, how did the FIA enforce the ban on launch control without it then?
Could anyone help me finding an answer?