Exclude it automatically, because allowing evidence obtained through an unlawful search weakens fundamental legal protections and incentives for proper police procedure.

Permit its use only when a judge determines that officers acted in good faith and the procedural error did not seriously prejudice rights.

Allow courts to consider the seriousness of the alleged offence, but require a high threshold before admitting material obtained through defective warrants.

Distinguish administrative mistakes from deliberate abuses, imposing stronger exclusion rules and personal accountability where authorities knowingly disregard legal safeguards.

Permit relevant evidence while separately sanctioning procedural errors, because excluding reliable material may undermine investigations and the interests of justice.

Require investigators to seek new lawful authorisation wherever possible before deciding whether previously seized material may be retained or examined.