These don't apply to me.  I was just doing an educational read online.  I've heard that if one has a motor vehicle that they claim they are asked to record a log book when they drove the car when and where etc.  The IRD website also says the same with phone calls.  Do people in the real world do that with phone calls as well?  Is it feasible?  Do they go thru the monthly bill every month and highlight out the personal calls and minus out those?  

Cheers.