The transition period we're talking about is not so much a matter of storage, but that while the plants are in transition, while they're cleaning out the system and finishing construction, everything out of the plant will be considered an SRM and will go to the renderer as an SRM. Therefore they will have additional costs relative to when they are finally fully functional with the segregation and storage system that meets the needs of the renderer, so they will forgo the income stream of meat and bonemeal that is non-SRM in nature.
On February 28th, 2007. See this statement in context.