Miss. Code § 27-57-3
It is declared to be the purpose and intention of the legislature to impose an excise on all persons engaged in the business of selling or distributing lubricating oil in the State of Mississippi, directly or indirectly, computed at the rates named in this article, subject to the exemptions and refunds herein enumerated, and the chancery court is hereby given jurisdiction to inquire into all violations and to impose and inflict the penalties herein provided; and especially is the chancery court hereby authorized and empowered to require any and all persons to disclose and discover full information with reference to their dealing in and handling of petroleum products as hereinbefore provided. Any and all persons making the disclosures and discoveries prayed for by any bill filed in the chancery courts of the State of Mississippi shall be and they are hereby given full and complete immunity from all fines and prison sentences imposed by this article.
Miss. Code § 27-57-3