Where a suit is withdrawn or abandoned by a plaintiff under rule 1, and a defendant applies to be transposed as a plaintiff under rule 10 of Order I the Court shall, in considering such application, have due regard to the question whether the applicant has a substantial question to be decided as against any of the other defendants.

Where a suit is withdrawn or abandoned by a plaintiff under rule 1, and a defendant applies to be transposed as a plaintiff under rule 10 of Order I the Court shall, in considering such application, have due regard to the question whether the applicant has a substantial question to be decided as against any of the other defendants.