I dont think the amount of protein or fat needs to change in ones diet for them to be eating LC.
If I was eating lets say 200 g carb daily, which would be considered 'normal' and lowered that to 50ecc g (which is what I had yesterday) that would be lowering my carbs to way below the general populous so therefore labelled LC.
If I am eating the right amount of protein recomended for my weight and lifestle and enough fat to provide the essentials needed, there is no need to change anything further.
I am not on a high/low fat diet or a high/low protein diet both I think should be adequate but for one to say they are eating LC that means in a nut shell they have cut the carbs back to considerably enough to be different than the norm. For health and satisfaction reasons we then also hopefully be sensible and choose our carbs from the most unrefined/natural and low glycemic factor as possible.
A person could though eat NO carbs all day and then have a spoon of sugar in hot chocolate at bedtime and still be LCing.
Just not a way I would recomend though. CAD is LC but i couldnt do it. The reward meal drove me to distraction.
I suppose it depends on how carb addicted you are and what your trigger foods are.
I get frustrated with the way some people ask me what i doing to lose weight and when i say Im LCing or on Atkins, they immediately start callingit a high protein diet. I didnt say that, I am not eating high protein (yesterday I had 78g) I am eating LC.
I eat between 10 and 12 x my lean body mass in calories a day. This is lower then many of you but I am happy with what I eat but minding the calories are not whats enabling me to be sucessful, its cutting out ALL the refined carbs and LCing so thats where I lay all the credit