The facts stated by the witness in a case before the court may be taken as evidence in any other case in the following
conditions,-
(a) In case, the witness has been dead or has become incompetent to be a witness pursuant to this Act, or
(b) In case, the witness has privilege not to provide evidence on that matter (fact) pursuant to this Act, or
(c) In case, the party to a case proves that the witness can not be produced before the court due to any conspiracy of the opposite
party, or
(d) In case a Notice can not be issued against him/her, or
(e) In case, it becomes inappropriate in the opinion of the court to produce him/her due to it being time consuming or expensive.