As I understand the amendment, it only relates to records that are kept in relation to warnings and not offences. Where the police officer issues a warning or makes a referral to a treatment program, the uses that would be permitted would be limited to proceedings with respect to the offence to which the record relates.
If, for instance, a police officer makes a warning or a referral in one case and that person doesn't successfully complete that treatment program, that warning or referral would not be able to be used in an additional case afterwards, only with respect to the offence to which the warning relates.