Amend CSHB 1173 on third reading in Article 3.51-14, Insurance Code, as amended by SECTION 1 of the bill, by adding a new Section 5 to the article to read as follows: Sec. 5. CERTAIN BENEFITS PROHIBITED. (a) This article may not be interpreted to require a group health benefit plan to provide coverage for treatment of: (1) addiction to a controlled substance or marihuana that is used in violation of law; or (2) mental illness resulting from the use of a controlled substance or marihuana in violation of law. (b) In this section, "controlled substance" and "marihuana" have the meanings assigned by Section 481.002, Health and Safety Code.