Senate committee substitute makes the following changes to the 2nd edition. Further amends GS 143B-1413 to also exempt employees of a law enforcement agency who are certified by the North Carolina Sheriffs' Education and Training Standards Commission from liability for any damages in a civil action resulting from death or injury to a person or from damage to property incurred by any person in connection with developing, adopting, implementing, maintaining, or operating the 911 system. Specifies that the statute does not apply to actions arising out of the operation or ownership of a motor vehicle by an employee of a law enforcement agency. Makes conforming changes to the act's long title.