Expiration dates on food aren't related to the risk of food poisoning or foodborne illness. Dates solely indicate freshness, and are used by manufacturers to convey when it's at its peak. Eggs, for example, can be consumed three to five weeks after purchase.
A tariff code is a product-specific code as documented in the Harmonized System (HS) maintained by the World Customs Organization (WCO). Tariff codes exist for almost every product involved in global commerce. Required on official shipping documents for tax assessment purposes, a tariff code ensures uniformity of product classification world wide. A complete tariff code is no less than six digits and can be up to ten. The more digits in a tariff code string, the more specific the product it identifies. A string of less than six digits is considered a partial tariff code and represents a broad product category or chapter of products in the HS.
HS compliance is the mandatory classification and declaration of goods coming into or leaving Canada. As an importer or exporter, you are responsible for the correct use of HS when declaring your goods.