The U.S. Supreme Court case Secretary of Agriculture v. Central Roig Refining Co., et al., in 1949 revolved around the interpretation and application of the Sugar Act of 1937, specifically concerning Puerto Rican sugar producers' quota allocations for domestic sales in mainland United States. The Secretary of Agriculture had interpreted a provision to mean that if any part of a producer's allocated quota was not used, it would be redistributed among other producers who had exceeded their quotas. Central Roig Refining Company and others challenged this interpretation, arguing that unused portions should instead be reallocated to those who hadn't met their quotas yet or kept until next year's allocation process. The Supreme Court ruled in favor of the Secretary’s interpretation stating that his understanding was consistent with both the language and purpose behind the legislation - ensuring an orderly market by preventing overproduction while also providing fair opportunities for all sugar producers.

In the dissenting opinion for Secretary of Agriculture v. Central Roig Refining Co., it was argued that the majority's decision to uphold a quota system under the Sugar Act of 1937, which limited Puerto Rico's sugar production and exports, was unconstitutional. The dissenters believed this act violated both due process and equal protection clauses by unfairly discriminating against Puerto Rican producers in favor of mainland U.S. producers without any rational basis or compelling state interest. They also contended that Congress exceeded its authority by imposing such restrictions on an unincorporated territory like Puerto Rico, where residents were not fully represented in federal government decisions affecting them directly. Furthermore, they criticized the majority for deferring too much to legislative judgment rather than scrutinizing more closely whether these quotas truly served public welfare as claimed.