The scope of practice of certified counselors and certified advisers consists exclusively of the following:

(1) Appropriate screening of the client's level of functional impairment using the global assessment of functioning as described in the fourth edition of the diagnostic and statistical manual of mental disorders, published in 1994. Recognition of a mental or physical disorder or a global assessment of functioning score of sixty or less requires that the certified counselor or certified adviser refer the client to a physician, osteopathic physician, psychiatric registered nurse practitioner, or licensed mental health practitioner, as defined by the secretary, for diagnosis and treatment;

(2) Certified counselors and certified advisers may counsel and guide a client in adjusting to life situations, developing new skills, and making desired changes, in accordance with the theories and techniques of a specific counseling method and established practice standards, if the client has a global assessment of functioning score greater than sixty;

(3) Certified counselors may counsel and guide a client in adjusting to life situations, developing new skills, and making desired changes if the client has a global assessment of functioning score of sixty or less if:

(a) The client has been referred to the certified counselor by a physician, osteopathic physician, psychiatric registered nurse practitioner, or licensed mental health practitioner, as defined by the secretary, and care is provided as part of a plan of treatment developed by the referring practitioner who is actively treating the client. The certified counselor must adhere to any conditions related to the certified counselor's role as specified in the plan of care; or

(b) The certified counselor referred the client to seek diagnosis and treatment from a physician, osteopathic physician, psychiatric registered nurse practitioner, or licensed mental health practitioner, as defined by the secretary, and the client refused, in writing, to seek treatment from the other provider. The certified counselor may provide services to the client consistent with a treatment plan developed by the certified counselor and the consultant or supervisor with whom the certified counselor has a written consultation or supervisory agreement. A certified counselor shall not be a sole treatment provider for a client with a global assessment of functioning score of less than fifty.