Well, perhaps they've mellowed since I was last involved with organic agriculture, but they certainly used to take a very stern line with anyone using the term organic who wasn't doing it all.
There are things a knowledgeable consumer would know they could rely upon when buying certified Organic, which would not be true of uncertified produce. Therefore the use of the term organic, when not certified, was deemed to be misleading. However, I haven't been actively involved for nearly a decade, so maybe things have changed. I doubt it, though, else why would people pay an arm and a leg for the certification?