NEW YORK — Telecommunications firms and  mobile-based apps make billions of dollars per year by selling customer  location data to marketers and other businesses, offering a vast window  into the whereabouts of cellphone and app users, often without their  knowledge.
That practice, which has come under increasing scrutiny and criticism  in recent years, is now the subject of a proposed ban in New York. If  the legislation is approved, it is believed that the city would become  the first to forbid the sale of geolocation data to third parties.
The bill, which was introduced Tuesday, would make it illegal for  cellphone companies and mobile app developers to share location data  gathered while a customer’s mobile device is within the five boroughs.
Cellphone companies and mobile apps collect detailed geolocation data  of their users and then sell that information to legitimate companies  such as digital marketers, roadside emergency assistance services,  retail advertisers, hedge funds or — in the case of a class-action  lawsuit filed against AT&T — bounty hunters.
“The average person has no idea they are vulnerable to this,” said  Councilman Justin L. Brannan, D-Brooklyn, who introduced the bill. “We  are concerned by the fact that someone can sign up for cell service and  their data can wind up in the hands of five different companies.”
In the absence of a federal law specifically protecting consumers’  location data, cities and states have stepped up to enforce privacy  regulations and location data rules. In San Francisco, voters approved a  ballot measure in 2018 that would require companies to disclose their  data practices and secure customer data to win city contracts.
In January, the city of Los Angeles filed a lawsuit against the  developers of the Weather Channel app, accusing them of deceptively  collecting location data from millions of American users. The app  tricked users into turning on location data by telling them that it  would be used only to localize weather reports. Instead, the data was  used for commercial purposes like analysis for hedge funds, the suit  alleged.
The proposed legislation in New York will almost certainly be opposed  by the ad tech industry, which has a strong presence in the city.  Brannan said he did not consult industry leaders for input.
The bill would restrict cellphone companies and mobile apps from  sharing location data to situations where they were “providing a service  explicitly requested” by the customer. The language is designed to  challenge the vague agreements customers click on when signing up for an  app or a cellular service. The legislation would also exclude the  collection of location data in “exchange for products or services.”
Marc Rotenberg, president of the Electronic Privacy Information  Center, said the collection of location data was now the “primary  technique to track people in physical space” and “raises far-reaching  privacy concerns.”
“New York City is joining a growing list of cities that are not waiting for Washington to pass privacy legislation,” he added.
The bill provides for steep fines, ranging from $1,000 per violation  to $10,000 per day per user for multiple violations, while giving  customers who have had their location data shared without their explicit  permission the right to sue.
David LeDuc, vice president of public  policy for the Network Advertising Initiative, said he was concerned  about allowing consumers to sue. The civil penalties under the law are  “substantial” enough to force compliance, he said.
“Tacking on a private right of action is merely an invitation for  unscrupulous trial attorneys to sue companies out of business, in many  cases likely for merely making a compliance error where consumers have  not suffered any injury,” LeDuc said.
Dave Grimaldi, executive vice president for public policy for the  Interactive Advertising Bureau, a national trade association, said that a  better approach would involve “a uniform national data privacy law that  protects consumers regardless of where they reside.”
Kathryn Wylde, president and chief executive of the Partnership for  New York City, echoed Grimaldi’s remarks, suggesting that New York’s  proposal would be an unwelcome addition to the “wide-ranging policy  standards” in different states that companies must navigate.
“This is not an efficient way to solve this problem,” Wylde said.
It is not yet clear whether the bill will  pass the full council, but the council speaker, Corey Johnson, said he  was open to exploring solutions to the privacy issues addressed in  Brannan’s bill.
“We live in an age where people’s private information is being sold  to the highest bidder, and it is important for us to think of  21st-century fixes,” Johnson said.
A spokeswoman for Mayor Bill de Blasio, Freddi Goldstein, said that  the mayor’s office will review the bill. If passed, the city’s  Department of Information Technology and Telecommunications would  enforce the law a department spokeswoman, Robin Levine, said the agency  agreed “wholeheartedly that New Yorkers’ personal information should  not be surreptitiously collected and exploited.”
Exceptions to the proposed ban include information legally supplied  to law enforcement agencies data provided to emergency responders data  required under federal, state or city law and situations where  customers knowingly provide their location data. The legislation does  not require that law enforcement agencies be given location data or  provide them with an entitlement to collect it.
Before the bill can come to a vote, it would probably first be heard  by the council’s Committee on Technology. Robert F. Holden, the  committee chairman, called the bill a “priority.”
“Privacy is a serious concern, especially in a day and age where more  and more of it is stripped from us as technology progresses,” said  Holden, who added that he was interested in seeing “how municipal  government can do better in protecting user data.”
AT&T, T-Mobile and Verizon have pledged to stop selling location  data to brokers who may sell the information on the black market. But  data on users’ whereabouts is lucrative: Location-targeted advertising  sales brought in an estimated $21 billion last year.
Sen. Kamala Harris of California, a Democrat seeking her party’s  nomination for president, has called on Congress to pass laws ending the  sale of location data.
Brannan said the failure of cellular companies to police themselves was all the more reason for cities to step up.
“Why should we trust them?” he said. “Once municipalities know they  have this tool in the arsenal, hopefully it will have a chain reaction.”