Section 37R. (a) As used in this section the following words shall have the following meanings, unless the context clearly requires otherwise:—
''School'', a school administered by a school department of a city or town or regional school district, a county agricultural school, a commonwealth charter school or Horace Mann charter school established pursuant to section 89 or an educational collaborative established pursuant to section 4E of chapter 40.
''Two-way communication device'', a device capable of transmitting, conveying or routing real-time, 2–way voice communications through radio frequency.
(b) Every school shall, subject to appropriation, possess and have access to a two-way communication device to be used solely for communicating with police and fire departments of the city or town where the school is located during an emergency situation.
(c) No public employer shall be liable for injury, loss of property, personal injury or death caused by an act or omission of a public employee while acting in the scope of the public employee's employment and arising out of the implementation of this section. This section shall not be construed as creating or imposing a specific duty of care.