What WFM has done is they offer separate sections for non-GMO products. These products as well as the shelves they occupy are clearly labeled "GMO-FREE". The products have also been certified as "GMO-FREE" by the Non GMO Project. The Non GMO Project is a non-profit organization that is independent from WFM whose sole function is to verify that non-GMO products are in fact non-GMO.
What I like about the WFM model is that there is little to no Governmental involvement. Senator Kouchi, Representative Kawakami and I have met with many of the grocery stores, including Times/Big Save, Foodland and Safeway to name a few, to encourage them to follow the WFM model. Thus far the dialogue has been productive and their responses have been positive.