Rule of Criminal Procedure 2

See Rules of Criminal Procedure.

Rule 2. Interpretation.
These rules are to be interpreted to provide for the just determination of every criminal proceeding, to secure simplicity in procedure and fairness in administration, and to eliminate unjustifiable expense and delay.

Commentary
TL;DR: The rules are a tool, not a burden. Magistrates should give some latitude to barristers and parties while refereeing. And barristers should not be watching keenly for I.W.I.N. buttons, because there are none.