501 C.M.R. 2.05
The Director shall approve the list of approved breath test devices. A device may be added to the list by the Director if it is on the National Highway Traffic Safety Administration's list of conforming products. The Office of Alcohol Testing shall maintain the list of approved breath test devices. The device shall have at least the following capabilities, but need not be limited to:
(c) performing subject breath tests in the following sequence: