105 CMR 470.408
Cells to Have Audio Devices
In accordance with Massachusetts law (M.G.L. c. 40, § 36B), at least one cell within each cell
block shall have installed within it, but beyond the access of any person detained within such cell, an
electronic audio system, whereby a police officer or other lockup personnel at the duty desk within
such lockup is brought within audible range of such cell. However, no such electronic audio system
is required to be installed if at least one cell within each cell block is within audible range of the duty
desk without electronic assistance.