locus standi
Concise Oxford English Dictionary © 2008 Oxford University Press:
locus standi /ˌləʊkəs ˈstandʌɪ, ˌlɒkəs/
▶noun (pl. loci standi /ˌləʊsʌɪˈstandʌɪ, ˌlɒkiː ˈstandiː/) Law the right or capacity to bring an action or to appear in a court.
– origin L., lit. ‘place of standing’.
'locus standi' also found in these Oxford entries:

