Because if it is decided that (example off the top of my head) "cucumbers grown in the pesticide Toxiciomosis cannot be sold as 'Class 1' cucumbers", there is j

Because if it is decided that (example off the top of my head) "cucumbers grown in the pesticide Toxiciomosis cannot be sold as 'Class 1' cucumbers", there is just one place which needs updating, rather than K contracts. DRY applies to more than code.