Gun owners who sought to take their firearms to second homes or shooting ranges outside the city challenged the rules in federal court, but the rules were upheld last year by the U.S. Court of Appeals for the Second Circuit. The Supreme Court agreed in January to hear the case next fall.
Gun control groups had urged the city to change its rules in hopes a quick surrender would prompt the justices to drop the case. The city's police department held a public hearing last month on the proposed changes and announced a final rule Friday that will take effect in 30 days.
"The Police Department ... reviewed the rules and determined that it was possible to modify them to reflect a carefully considered accommodation to the interests of licensees while also ensuring the safe transport of handguns," the announcement said.