Need some good advice on tacho laws please

Thanks for the reply it really helped!

I read that you can have 60 work time a week 13 hours but 15 hours maximum a week.

Does POA take away work time sir for example I had had 10 hours working directive and 1 hours POS does it equal to 12 hours working directive or just the obvious 10 hours working directive and 1 hour POA?

Thanks