The Collaborative International Dictionary
Exigible
Exigible \Ex"i*gi*ble\, a. [Cf. F. exigible. See Exigent.]
That may be exacted; repairable. [R.]
--A. Smith.
Wiktionary
exigible
a. 1 That may be exacted; demandable; requirable. 2 (of a tax or duty) able to be charged