Madam Speaker, let me make it clear that a criminal record is permanent. It does not matter if a particular charge goes back 30 or 40 years. Once someone has a criminal charge on their record, it stays there forever.
Background checks will be more relevant if they show substance abuse problems, domestic violence, or things a person may have said at 15 but would never say at 30 or 40. People do things in their youth that are not necessarily crimes but that can influence whether a licence is issued. Criminal records, even 30-year-old records, are included in background checks.