134 Retiree means a person who formerly qualified as an Employee, who has retired from active employment while covered by this Plan, and on whose behalf the Employer continues to make the required contributions to the Plan, but only if the particular collective bargaining agreement or participation agreement allows for Retiree coverage. Serious and Complex Condition mean with respect to a participant, beneficiary, or enrollee under the Plan, one of the following: 1. in the case of an acute illness, a condition that is serious enough to require specialized medical treatment to avoid the reasonable possibility of death or permanent disability; or 2. in the case of a chronic illness or condition, a condition that is — a. is life-threatening, degenerative, potentially disabling, or congenital; and b. requires specialized medical care over a prolonged period. Skilled Nursing Facility and Rehabilitation Hospital each mean only an institution that meets all of the following tests: • It mainly provides skilled nursing care or rehabilitation care to registered inpatients; • It provides care that is supervised, 24 hours per day, by a physician or registered Nurse; • It is available at all times a physician who is a staff member of an Acute Care Hospital; • It has a registered Nurse, licensed vocational Nurse, or licensed practical Nurse on duty 24 hours per day and has a registered Nurse on duty at least eight hours per day; • It maintains a daily medical record for each patient; • It complies with all licensing and other legal requirements; • It is not a Specialized Facility; and • It is not, other than incidentally: (1) a place for Custodial Care; (2) a place for the aged; (3) a place for the care of persons addicted to or dependent on a drug or chemical, including alcohol; (4) a place for the care of persons with mental, nervous, or emotional disorders or conditions; (5) a place of rest; or (6) a nursing home, a hotel, or a similar institution. Specialists mean a physician who provides specialized services, and is not engaged in general practice, family practice, internal medicine, obstetrics/gynecology or pediatrics. Specialized Facility means only an Ambulatory Surgical Facility, a Birth Center, a Mental Health Residential Treatment Center, and a Substance Use Disorder Residential Treatment Center, whether physically or legally a part of another facility. Spouse means the person to whom an Employee is legally married, as determined by both state law and with whom the employee can file a joint income tax return pursuant to the U.S. Tax Code. Substance Use Disorder Residential Treatment Center means a facility that is licensed in accordance with the laws of the appropriate legally authorized agency as a residential treatment center for alcoholism, drug or chemical dependence. Substance Use Disorder Treatment Services are services that are required to treat psychological or physical dependence on alcohol or other mind-altering drugs that requires diagnosis, care, and