In each sale of a health benefits plan to a proposed eligible employer through a health insurance purchasing group in which the health insurance purchasing group offers an option to an eligible employer to obtain a health benefits plan that, either in whole or in part, does not provide state-mandated health benefits or does not contain standard provisions as may be determined by rules of the Insurance Commissioner, the health insurance purchasing group, after the employer has selected its health benefit plan, shall provide to each eligible employee of the employer a written notice, in a form and manner as prescribed by rule promulgated by the commissioner, that one (1) or more mandated benefits are not included in the health benefit plan.