Students with severe multiple impairments shall be determined through the manifestation of either of the following:
(a) Development at a rate of 2 to 3 standard deviations below the mean and 2 or more of the following conditions: Michigan Administrative Rules for Special Education With Related IDEA Federal Regulations 43
(i) A hearing impairment so severe that the auditory channel is not the primary means of developing speech and language skills.
(ii) A visual impairment so severe that the visual channel is not sufficient to guide independent mobility.
(iii) A physical impairment so severe that activities of daily living cannot be achieved without assistance.
(iv) A health impairment so severe that the student is medically at risk.
(b) Development at a rate of 3 or more standard deviations below the mean or students for whom evaluation instruments do not provide a valid measure of cognitive ability and 1 or more of the following conditions:
(i) A hearing impairment so severe that the auditory channel is not the primary means of developing speech and language skills.
(ii) A visual impairment so severe that the visual channel is not sufficient to guide independent mobility.
(iii) A physical impairment so severe that activities of daily living cannot be achieved without assistance.
(iv) A health impairment so severe that the student is medically at risk.
