No public utility, excepting utilities excluded from rate regulation pursuant to Miss. Code Ann. § 77-3-5, shall be permitted to recover from its ratepayers any direct or indirect expenditure made by such utility for political advertising as defined herein. For the purposes of this paragraph, "political advertising" means any advertising for the purpose of influencing public opinion with respect to legislative, administrative or electoral matters, or with respect to any controversial issue of public importance.
39 Miss. Code. R. 1-20-101