Do have a source for that, because it would make very little sense and seems highly unenforceable.
EU antitrust fines are also capped at 10% of the total turnover. http://ec.europa.eu/competition/cartels/overview/factsheet_f...
As to your link on EU fines, it very clearly states that fines are a percentage of "relevant sales", defined as "usually the sales of the products covered by the infringement". I don't know how you came to the conclusion that means global sales?