http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?c=ecfr&rgn=div5&view=text&node=38:1.0.1.1.5&idno=38
6847 Sleep Apnea Syndromes (Obstructive, Central, Mixed):
Chronic respiratory failure with carbon dioxide retention or cor pulmonale, or; requires tracheostomy 100
Requires use of breathing...