Where a plaintiff has a demand recoverable under this Act against two or more persons jointly liable, it shall be sufficient to serve any of those persons with process, and judgment may be obtained and execution issued against any person so served, notwithstanding that others jointly liable may not have been served or sued or may not be within the jurisdiction of the court.
Where judgment is so obtained against any person by virtue of subsection (1) and is satisfied by that person, he shall be entitled to recover in the court contribution from any other person jointly liable with him.