The tacho rules are supposed to be simple, but when you get into what rules you can 'break or bend' it starts getting complicated. (for example, in Chris' example, you can only drive for 9 hrs per day, but twice a week you are allowed to drive 10 hrs, hence the 56hrs). You would be much better off getting a book on the rules from RTA or someone. As such, the rules for a Digicard are exactly the same as for a analogue chart. The main problem my colleagues have is that you cannot set a digitach to default to reast when you stop...you have to rememeber to change the mode. As with an analogue, it will automatically got to 'driving' as soon as you move. Next problem with a digitach; if you move bit by bit (like in a queue on the motorway), the digitach decides you have driven for 1 minute. You can easily reach your driving time, so watch it! Personally i don't know why the things were invented. Everyone I know has problems with them and the old charts were so easy to use, but thats 'European' progress for you!