It’s up to you to set the point that you are calling the retest date for your batch. Make sure you’re
using good science and good common sense. If you have a highly stable product, then it may be
okay to set your retest date based on the testing date. If your product is not highly stable, it could
appear that you are trying to extend the retest time beyond what would typically be allowed. So
just take a look at your own internal practice, and ensure it makes sense from both a common
sense approach and also from a good science approach. Typically, the date for a blended batch
should be based on the date of the oldest material that goes into that batch, and it seems to try to
circumvent that by setting your date based on testing after blending.
