Stuart, the general idea seems to be that a 7-14 day withholding period - both both eggs and meat is what has been suggested elsewhere. The reasons
are a bit vague but may come down to that, as with many other medications, the required tests and results and expensive approval process have not been completed so product suppliers err on the side of caution to cover themselves in case of adverse human reactions to any residues. Some people are sensitive to sulpha.
I recalled this thread that if you haven't seen may be helpful but I feel that you'll still have to read between the lines and end up making up your own mind. Question re Coccidiostat- reply from feed producer