Miss. R. Civ. P. 24

(a) Intervention of Right. Upon timely application, anyone shall be permitted to

intervene in an action:

(1) when a statute confers an unconditional right to intervene; or

(2) when the applicant claims an interest relating to the property or transaction which

is the subject of the action and he is so situated that the disposition of the action may as a

practical matter impair or impede his ability to protect that interest, unless the applicant’s

interest is adequately represented by existing parties.

(b) Permissive Intervention. Upon timely application anyone may be permitted to

intervene in an action:

(1) when a statute confers a conditional right to intervene; or

(2) when an applicant’s claim or defense and the main action have a question of law

or fact in common.

When a party to an action relies for ground of claim or defense upon any statute or

executive order administered by a federal or state governmental officer or agency, or upon

any regulation, order, requirement, or agreement issued or made pursuant to the statute or

executive order, the officer or agency upon timely application may be permitted to intervene

in the action. In exercising its discretion the court shall consider whether the intervention

will unduly delay or prejudice the adjudication of the rights of the original parties.

(c) Procedure. A person desiring to intervene shall serve a motion to intervene upon

the parties as provided in Rule 5. The motion shall state the grounds therefor and shall be

accompanied by a pleading setting forth the claim or defense for which intervention is

sought. The same procedure shall be followed when a statute gives a right to intervene.

(d) Intervention by the State. In any action (1) to restrain or enjoin the enforcement,

operation, or execution of any statute of the State of Mississippi by restraining or enjoining

the action of any officer of the State or any political subdivision thereof, or the action of any

agency, board, or commission acting under state law, in which a claim is asserted that the

statute under which the action sought to be restrained or enjoined is to be taken is

unconstitutional, or (2) for declaratory relief brought pursuant to Rule 57 in which a

declaration or adjudication of the unconstitutionality of any statute of the State of Mississippi

is among the relief requested, the party asserting the unconstitutionality of the statute shall

notify the Attorney General of the State of Mississippi within such time as to afford him an

opportunity to intervene and argue the question of constitutionality.