Miss. Code § 21-1-31
Upon the filing of such petition and upon application therefor by the petitioner, the chancellor shall fix a date certain, either in term time or in vacation, when a hearing on said petition will be held, and notice thereof shall be given in the same manner and for the same length of time as is provided in Section 21-1-15 with regard to the creation of municipal corporations, and all parties interested in, affected by, or being aggrieved by said proposed enlargement or contraction shall have the right to appear at such hearing and present their objection to such proposed enlargement or contraction. However, in all cases of the enlargement of municipalities where any of the territory proposed to be incorporated is located within three miles of another existing municipality, then such other existing municipality shall be made a party defendant to said petition and shall be served with process in the manner provided by law, which process shall be served at least thirty days prior to the date set for the hearing.
Miss. Code § 21-1-31