Mississippi Code Title 59. Ports, Harbors, Landings and Watercraft § 59-21-7

The numbering pattern to be used shall be as follows:

The number shall be divided into three (3) parts. The first part shall consist of the symbol MI; the second part shall consist of a numerical group having a maximum of four (4) digits; the third part shall consist of an alphabetical group having a maximum of two (2) letters. Each part shall be separated by hyphens or equivalent spaces.

Vessels shall be given numerical and alphabetical designations in the second and third groups in the order of their application.

The number awarded to a vessel under the provisions of this chapter shall remain the number for such vessel until the vessel is lost, destroyed, abandoned or registered in another state.