The legislature held a hearing last month on a bill called the Location Shield Act, a sweeping proposal that would sharply curtail the practice of collecting and selling location data drawn from mobile phones in Massachusetts. The proposal would also institute a warrant requirement for law-enforcement access to location data, banning data brokers from providing location information about state residents without court authorization in most circumstances.
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No state has gone so far as to completely ban the sale of location data on residents. The most common approach in other states is to require digital services and data brokers to obtain clear consent from consumers to collect data and put some restrictions on transfer and sale."