34.2. The Board shall assume the cost of purchase or replacement of a TTY modem for a person with a hearing deficiency who is capable of using one and is able to decode and transmit a message by voice, and whose hearing loss is measured at not less than 71 dB, or at not less than 55 dB where that person has a marked difficulty with auditory discrimination and if the modem is being furnished to the person instead of a TTY.