House committee substitute to the 1st edition makes the following changes. Amends GS 97-53 to provide that posttraumatic stress disorder is a compensable occupational disease if the first responder is examined and subsequently diagnosed with such disorder by a healthcare provider who establishes within a reasonable degree of medical certainty that the posttraumatic stress disorder is caused by activities of employment as a first responder (was, compensable occupational disease that arises out of employment as a first responder and arises out of injuries that are characteristic of and peculiar to a particular trade occupation, process, or employment if the specified conditions were met; also previously, required the disorder to be demonstrated by a preponderance of medical evidence demonstrated by a licensed psychiatrist or licensed psychologist). Makes additional technical changes. Amends the act's long title.