Miss. Code Ann. § 27-55-3

It is declared to be the purpose and intention of the legislature to impose an excise tax to provide highways, streets, and roads, on all persons engaged in the business as a distributor of gasoline in this state, computed at the rate stated herein, subject to the exemptions and refunds herein set forth; to inquire into all violations; and to impose and inflict the penalties herein provided; and especially are the chancery courts of this state authorized and empowered to require any and all persons to disclose and discover full information with reference to their dealing in and handling of gasoline as herein 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 are hereby given full and complete immunity from all fines and jail sentences imposed by this article.