Limitations of right of examinations-in-chief, cross-examination and re-examination

(1) The examination-in-chief and the cross-examination must relate to facts in issue or relevant thereto, or which may be proved, but the cross-examination need not be confined to the facts to which the witness has testified on his examination-in-chief. examination-in- chief, cross- examination and (2) The re-examination must be directed to the explanation of matters referred to in the cross-examination and if new matter is 40 by permission of the judge introduced in re-examination, the opposite party may further cross-examine upon that matter.