The U.S. Supreme Court case Lumbermen's Mutual Casualty Co. v. Elbert in 1954 revolved around the interpretation of an insurance policy clause related to automobile use and coverage for accidents involving non-owned vehicles driven by the insured party, Mr. Elbert. The insurer, Lumbermen's Mutual Casualty Company, argued that it was not liable for damages resulting from a collision because at the time of accident Mr.Elbert was driving a borrowed vehicle which he had been using regularly without notifying them as required by his policy terms . However, Mr.Elbert contended that he did not violate any conditions since he only used this particular vehicle occasionally and therefore didn't need to inform his insurer about its usage. The court ruled in favor of Mr.Elbert stating that occasional use does not equate regular use under normal understanding or common parlance; hence there wasn't any breach on part of him regarding notification requirement stipulated in his insurance contract with Lumberman’s Mutual Casualty Company.

In the dissenting opinion for Lumbermen's Mutual Casualty Co. v. Elbert, Justice Robert H. Jackson disagreed with the majority's decision to uphold a state law that allowed an injured party to sue an insurance company directly without first obtaining judgment against the insured person or entity responsible for causing harm. He argued that this violated principles of federalism by allowing states to regulate contracts made outside their borders and interfered with interstate commerce by imposing burdensome requirements on out-of-state companies doing business within their jurisdiction. Furthermore, he contended that it undermined basic tenets of contract law by altering terms agreed upon between private parties without their consent and potentially exposing insurers to greater liability than they had bargained for in their policies.