Is Contamination of Pure Oats a World Wide Problem?

"If farmers grow rye, wheat, and barley in addition to oats,
and if the processors handle these grains, then cross-contamination
is a significant problem. Processors who claim their oats are pure
need to provide evidence that proves it. The Canadian Celiac Association,
for example, has a position paper on oats that describes requirements
for growing, processing, testing and labeling of pure oats. These
strategies have led to the production of oat products that are safe."

-Gluten-Free Living Magazine, Number 2/2011