If the entirety of your criminal record incurred when you were under the age of 18 AND it was before 1984, you would still require a Pardon as this was before the Young Offenders Act (as of 2003, now called the Youth Criminal Justice Act). If the entirety of your criminal record was incurred after 1984 when you were under the age of 18, you may not require a Pardon.
Note that the moment you are convicted of an offense in court at the age of 18 or older, any convictions as a youth would remain publicly visible and a Pardon would be required. If you are unsure whether you require a Pardon for your youth record, contact a BBB Accredited Pardon Officer via Schedule a call.