In my latest box of Aviva test strips there was a black code chip with the number '111' on it. I have attached a photo of the leaflet in the box of strips. The text on the leaflet says: Black Code Chip Information How to use the black code chip found in this test strip box: The black code chip works for ALL test strips intended for use with your meter. Continue using the black code chip even if new test strip boxes contain different coloured code chips or different code numbers. After inserting the black code chip, discard any future code chips you receive. Always check the use by date on the test strip container before performing a blood glucose or control test. Do not use test strips past the use by date. So basically it looks like I'm never going to have to change that silly code chip again! It takes about 2 seconds, but it's still nice not to have to do that extra step. I'm not sure whether the black code chips are around in the US yet, but if they aren't and if anyone would like one, I will probably have more in the other boxes of strips I got from the pharmacy at the same time.