(a) If in the course of a disciplinary proceeding, the Appointed Board finds that a Professional Geoscientist's abuse of alcohol or a controlled substance, as defined by the Texas Controlled Substances Act, Chapter 481, Texas Health and Safety Code, contributed to a violation of the TBPG Act or rules, the Appointed Board may condition its disposition of the disciplinary matter on the Professional Geoscientist's completion of a rehabilitation program approved by the Department of State Health Services.(b) A Professional Geoscientist's abuse of alcohol or a controlled substance that results in the impairment of the Professional Geoscientist's professional skill so as to cause or potentially cause a threat to the public health, safety, and welfare may be deemed "Gross Incompetency" and may be grounds for revocation or suspension of a Professional Geoscientist's license or other appropriate disciplinary actions provided by the Act.(c) To determine whether abuse of alcohol or a controlled substance contributed to a violation or whether the continued professional practice of a licensee is a threat to the public safety the Appointed Board may order an examination by one or more licensed health care providers authorized to provide diagnosis or treatment of substance abuse.