Upon the filing of the petition and after hearing, of which due notice shall be given to all parties, the court, if the allegations of the petition have been established and are found to be sufficient, shall enter an order allowing intervention; but an application for intervention may be refused, if

1. (1) the claim or defense of the petitioner is not in subordination to and in recognition of the propriety of the action; or
2. (2) the interest of the petitioner is already adequately represented; or

3. (3) the petitioner has unduly delayed in making application for intervention or the intervention will unduly delay, embarrass or prejudice the trial or the adjudication of the rights of the parties.

   Official Note

   Adopted June 7, 1940. Effective February 3, 1941. Amended April 18, 1975. Effective Immediately, 5 Pa.B. 1820.