Rules of court may make provision with respect to—
the joinder as parties to proceedings under sections 37 to 56 of persons involved in allegations of improper conduct made in those proceedings,
the dismissal from such proceedings of any parties so joined, and
the persons who are to be parties to proceedings on an application under section 58.
Rules of court made under this section may make different provision for different cases.
In every case in which the court considers, in the interest of a person not already a party to the proceedings, that the person should be made a party, the court may if it thinks fit allow the person to intervene upon such terms, if any, as the court thinks just.