You've touched a very raw nerve Hano....
Yes the ACF does have standardized tests, but the ACF is not a Gov't recognized body.
Cooking is a trade, and there are many Gov't recognized trades and some very strict and Gov't regulated tests for these trades. Plumbers, gasfitters, electricians, automotive mechanics, etc. etc.. You wouldn't trust an electrician to wire your house or a gasfitter to install a hot water heater without having his "ticket" would you? Sadly, cooking isn't one of these recognized trades, and there are no standard, national tests for cooking. Hence we have a plethora of private cooking schools, some very good, and some just an excuse to extract money from gullible students.
Cooking is more than just knife skills or speed. It requires a very thorough and deep understanding of cooking techniques and how to apply them, understanding and repect for ingredients and how best to use them; cooking demands multi tasking and good timing, demands team players, and demands fierce loyalty.