Mississippi Code Title 21. Municipalities § 21-21-37

While any law enforcement officer regularly employed as such in one municipality is in the service of another municipality pursuant to Sections 21-21-31 through 21-21-41, he shall be a peace officer of such other municipality and be under the command of the law enforcement officer therein who is in charge in that municipality, with all the powers of a regular law enforcement officer in such other municipality, as fully as though he were within the municipality where regularly employed and his qualification, respectively, for office where regularly employed shall constitute his qualification for office in such other municipality, and no other oath, bond, or compensation need be made.