Like other nutrition programs around the world, Canada's Food Guide divides nutrition into four main food groups: vegetables and fruit, grain products, milk and alternatives, and meat and alternatives.
Therefore, it is in the school district's discretion to decide how long to keep such records. In keeping with the intent of 603 CMR 23.06, however, the time limit for destruction of the record should probably be not less than sixty years for a transcript and not more than five years for the temporary record.
1 Keep records for 3 years if situations (4), (5), and (6) below do not apply to you.  Keep records for 3 years from the date you filed your original return or 2 years from the date you paid the tax, whichever is later, if you file a claim for credit or refund after you file your return.