The liability of an employer for medical treatment is not affected by the fact that the employee was injured through the fault or negligence of a third party not in the same employ, until notice of election to sue has been given as required by Alaska Stat. § 23.30.015(a) or suit has been brought against the third party without giving notice. The employer has, however, a cause of action against the third party to recover any amounts paid by the employer for the medical treatment in like manner as provided in Alaska Stat. § 23.30.015(b).