Stockholders have expressed concerns about the GreenLeaf Company, a prominent furniture manufacturer, due to the fact that most of GreenLeaf's furniture is produced in Country Y using local timber, where illegal logging is prevalent. To address these concerns, GreenLeaf has implemented a certification program for lumber suppliers. They have employed a team of auditors and forestry experts who examine the documentation of timber sources from Country Y's suppliers to confirm their legal origins, conduct unannounced inspections of suppliers to verify records, and certify those that meet legal standards. GreenLeaf exclusively sources timber from these certified suppliers. Therefore, GreenLeaf's assertion that its timber supply from Country Y is legally sourced is deemed valid.

Which of the following, if true, would most weaken the validity of GreenLeaf's assertion?