Where did evergreen clause term originate?

The term "evergreen clause" originated in the context of contracts, particularly in the telecommunications and real estate industries. It refers to a provision that automatically renews a contract for a specified period unless one party gives notice to terminate it. The term "evergreen" symbolizes the idea of perpetual renewal, akin to evergreen trees that retain their foliage year-round. This concept has since been adopted in various contractual agreements across multiple sectors.