Section 240.   Recall of witnesses when charge altered.

Whenever a charge is altered or added to by the Court after the commencement
of the trial, the prosecutor and the accused shall be allowed—
(a) to recall or re-summon, and examine with reference to such alteration or
addition, any witness who may have been examined, unless the Court, for reasons to
be recorded in writing, considers that the prosecutor or the accused, as the case may
be, desires to recall or re-examine such witness for the purpose of vexation or delay or
for defeating the ends of justice;
(b) also to call any further witness whom the Court may think to be material.