You could leave them taped for more than 12 hrs. but I would not do it for 24 hrs a day. You would probably end up with some sores from the taping, and believe me, your chicks will be very unhappy with being taped, allowing them to have freedom and be with the unaffected chicks will keep them happier. They cannot walk while taped they will fly and hop, but they cannot walk and I think 24 hrs like this would have a neg. affect on them. I saw no improvement in mine until the middle of the third week of taping. But I could see that it was not getting worse, if left untreated the leg will rotate until it is pointed backwards and they cannot walk at all. We had it happen to a guinea chick before I knew about the taping and she was crippled completely, we were going to put her down, but the neighbors chickens did it for us.
I used "Poultry Pack" vitamins and mixed into the water everyday for a week and then one day a week after that.