and owners of large and turbine-powered multiengine aircraft are treated equally for purposes of joint ownership policies of the FAA. 551. Employee Assault Prevention and Response Plans (a) In general Not later than 90 days after the date of enactment of this Act, each air carrier operating under part 121 of title 14, Code of Federal Regulations (in this section referred to as a part 121 air carrier ), shall submit to the Administrator for review and acceptance an Employee Assault Prevention and Response Plan related to the customer service agents of the air carrier and that is developed in consultation with the labor union representing such agents. (b) Contents of plan An Employee Assault Prevention and Response Plan submitted under subsection (a) shall include the following: (1) Reporting protocols for air carrier customer service agents who have been the victim of a verbal or physical assault. (2) Protocols for the immediate notification of law enforcement after an incident of verbal or physical assault committed against an air carrier customer service agent. (3) Protocols for informing Federal law enforcement with respect to violations of section 46503 of title 49, United States Code. (4) Protocols for ensuring that a passenger involved in a violent incident with a customer service agent of an air carrier is not allowed to move through airport security or board an aircraft until appropriate law enforcement has had an opportunity to assess the incident and take appropriate action. (5) Protocols for air carriers to inform passengers of Federal laws protecting Federal, airport, and air carrier employees who have security duties within an airport. (c) Employee training A part 121 air carrier shall conduct initial and recurrent training for all employees, including management, of the air carrier with respect to the plan required under subsection (a), which shall include training on de-escalating hostile situations, written protocols on dealing with hostile situations, and the reporting of relevant incidents. (d)