A federal appeals court ruled that "chalking" is a violation of the fourth amendment saying that when officers chalk your tires they would be trespassing. Parking enforcement officers take a piece of chalk and mark the tire of a car to see if it's moved in time parking spaces. If it hasn't when the times up, they'll give the owner a ticket. Parking spaces are limited, especially in downtown areas. One Grand Island business owner said it's important to have available spaces for his customers.
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Ninth Circuit Chalking up a Split: Chalking Tires is Reasonable under the Fourth Amendment
Question about “The old sidewall chalk trick”, Grassroots Motorsports forum
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1994-1995 The Times (Peru, NE) - issues 1-10 by Peru State College Library - Issuu
Parking officials can't chalk tires, court rules
Parking officials can't chalk tires, court rules
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Court: Chalked tires violate Fourth Amendment
Parking officials can't chalk tires, court rules
Court Says Using Chalk On Tires For Parking Enforcement Violates Constitution - WJCT Public Media
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Parking Enforcers Who Chalk Tires Violate The Constitution, Court Rules : NPR