Ifcongress，inregulatingcommerce，shouldpassanyact，theobjectofwhichshouldbetocontrolstatelegislationoversuchnavigablestreamsorcreeks，therewouldbelittledifficultyinsaying，thatastatelawinconflictwithsuchanactwouldbevoid。Butifcongresshaspassednogeneralorspecialactonthesubject，theinvalidityofsuchastateactmustbeplacedentirelyuponitsrepugnancytothepowertoregulatecommerceinitsdormantMate。Undersuchcircumstances，itwouldbedifficulttoaffirm，thatthesovereigntyofastate，actingonsubjectswithinthereachofotherpowers，besidethatofregulatingcommerce，andwhichbelongedtoitsgeneralterritorialjurisdiction，wouldbeinterceptedbytheexclusivepowerofcommerce，unexercisedbycongress，overthesamesubjectmatter。
Thevalueofthepropertyonthebanksofsuchstreamsandcreeksmaybemateriallyenhancedbyexcludingthewatersfromthemandtheadjacentlowandmarshygrounds，andthehealthoftheinhabitantsbeimproved。
Measurescalculatedtoproducetheseobjects，providedtheydonotcomeintocollisionwiththepowerofthegeneralgovernment，areundoubtedlywithinthose，whicharereservedtothestates。43
§；1070。Inthenextplace，towhatextent，andforwhatobjectsandpurposesthepowertoregulatecommercemaybeconstitutionallyapplied。
§；1071。Andfirst，amongthestates。