C. Dretg federal e dretg chantunal
I. Dretg civil chantunal ed isanza locala
1 Ils chantuns èn autorisads da decretar u d’abolir disposiziuns dal dretg civil, uschenavant ch’il dretg federal resalva quai al dretg chantunal.
2 Nua che la lescha renviescha a la pratica u a l’isanza locala, vala il dretg chantunal vertent sco expressiun da quellas, uschè ditg ch’ina pratica divaergenta n’è betg cumprovada.
C. Federal law and cantonal law
I. Cantonal civil law and local custom
1 Insofar as federal law reserves the application of cantonal law, the cantons may enact or repeal civil law provisions.
2 Where the law makes reference to practice or local custom, the existing cantonal law is deemed a valid expression thereof, provided no divaergent practice is shown to exist.