[ex.cep.tio pro.bat re.gu.lam de re.bus non ex.cep.tis] [L] foreign term : an exception establishes the rule as to things not excepted
EXCEPTIO PROBAT REGULAM DE REBUS NON EXCEPTIS
Meaning of EXCEPTIO PROBAT REGULAM DE REBUS NON EXCEPTIS in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012