“date of redemption”, in relation to an instrument, means-
(a) where-
(i) the terms of that instrument specify a date on which all liability to pay all amounts in terms of that instrument will be discharged; and
(ii) the date so specified is not, in terms of the instrument, subject to change, whether as a result of any right, fixed or contingent, of the holder of that instrument or otherwise,
that date; or
(b) where-
(i) the terms of that instrument do not specify a date as contemplated in paragraph (a)(i); or
(ii) that date, if so specified, is subject to change as contemplated in paragraph (a)(ii),
the date on which, on a balance of probabilities, all liability to pay all amounts in terms of that instrument is likely to be discharged;