I have my DLA renewal in front of me. Below is the broad introduction (slightly edited for brevity - I'm not hiding anything). There are then 25 pages of detailed Qs.
Help with getting around
The rate you can get depends on the amount of help you need and on the sort of help you need. [...]
Lower rate
You can get lower rate if you can walk but
? you need someone with you to make sure you are safe
? you need someone with you to help you find your way around in places you do not know well
Higher rate
You can get higher rate if
? you cannot walk at all
? you can only walk a short distance before you feel severe discomfort
? the effort of walking could threaten your life
? you have had both legs amputated above the ankle or at the ankle, or you were born without legs or feet
? you are both deaf and blind and you need someone with you when you are outdoors.[...]
?you are severely mentally impaired and have severe behavioural problems and need help with personal care both day and night
Help with personal care
The rate you get depends on the amount of attention, help of supervision you need, and on the sort of help or supervision you need. For example, you may need someone to keep an eye on you, or look after you when you are on dialysis. Or you may need help with things like washing, dressing, using the toilet, communicating with other people, or something like this. [...]
Lowest rate
You can get lowest rate if
? you cannot prepare a cooked main meal for yourself, if you have everything you need. This only applies if you are 16 or over
? you have care needs for some time during the day
Middle rate
You can get middle rate if
? you have care needs for some time during the day, or if you are liable to get into danger
? you have care needs for some time during the night
Highest care
You can get the highest rate if
? you have care need for some time during the day and night