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Following a suggestion by Smit, the CP odd terms of the effective action ofthe Standard Model, obtained by integration of quarks and leptons, are computedto sixth order within a strict covariant derivative expansion approach. Noother approximations are made. The final result so derived includes allStandard Model gauge fields and Higgs. Remarkably, at the order considered inthis work, all parity violating contributions turn out to be zero. Nonvanishing CP violating terms are obtained in the C-odd P-even sector. These areseveral orders of magnitude larger than perturbative estimates. Variousunexpected regularities in the final result are noted.

CP violation in the effective action of the Standard Model