(b) A motion by a plaintiff for leave to join a third-party defendant pursuant to Rule 14(b), Fed.R.Civ.P., shall be made within six (6) months from the date of service of the moving plaintiff's reply to the counterclaim, or at least sixty (60) days prior to a scheduled trial date, whichever first occurs.
(c) The provision of this rule may be suspended upon a showing of good cause therefor.
