Final answer:
The FDA may not require GMO labelling when an alteration such as transferring a gene from lettuce to soybeans does not significantly change the nutritional composition, introduce known allergens, or alter the product significantly.
Step-by-step explanation:
The official FDA position does not require labelling of GMO crops unless the genetic modification materially changes the product’s nutritional composition, increases levels of a toxicant, introduces allergens, or represents a whole new product. An example of when the FDA might not require GMO labelling is when a gene from one commonly consumed plant, like lettuce, is transferred to another, such as soybeans used in making cooking oil, and this alteration does not materially change the final product or introduce known allergens. Essentially, if the food derived from a GMO does not differ from its non-engineered counterpart in terms of nutritional value, allergenicity, or composition, labelling may not be required.