Scotland Bill

I have been listening carefully to what the Minister is saying but am still a little puzzled. I understand the example of a sales rep who might use hotels or temporary accommodation, but if the other residence is another house or flat that the resident has registered for council tax or for the purpose of being on the electoral register, for example, does that come under that definition? My father, for example, could self-declare his home in Scotland as his principal residence, even though he might spend a minority of the time in a year there.