par·tic·i·pat·ing adj
1: involving participation by more than one person or agency
2: sharing in distributions:
a: entitling the holder to a share in any distribution of surplus by the issuing insurance company
b: entitled to a share in distributions that are in addition to regular fixed income
participating shares

Merriam-Webster’s Dictionary of Law. . 1996.

index common (shared), concurrent (united)

Burton's Legal Thesaurus. . 2006