If contraband is found in a vehicle within reach of occupants, who can LE arrest?

In most cases, everyone in the car. For example, where a large amount of money is found rolled up in a vehicle’s glove compartment, and five plastic glassine baggies of cocaine are found behind the center armrest of the backseat, with the armrest pushed up into the closed position to hide the contraband, such contraband being accessible to all the occupants of the vehicle, the arrest of all three subjects in the vehicle (driver, right front and rear seat passengers) was supported by probable cause. Maryland v. Pringle (2003) 540 U.S. 366.