disability element of working tax credit

Hi my daughter has epilepsy and has been in receipt of DLA and the disability element of working tax credit.
She has just been refused any entitlement to PIP and her DLA has ceased.
She has now received a letter from Tax Credit Office stating that as her entitlement to DLA has ceased they have to decide whether she is still entitled to the disability element of Working Tax Credits.
She certainly meets conditions 1 and 2 of the 3 qualifying conditions but i'm having difficulty in understanding whether she meets condition 3 as shown on form TC956.
She gets National Insurance Credits as she is in receipt of Child Benefit for her 2 children.
On page 7 of TC956 it goes on about "by getting Disabled Persons Tax Credit at some earlier time"
Can you please advise if she is still entitled to the disability element or not as it seems very vague.
We have asked for a review of the disallowance of PIP but this is the latest hurdle to try and overcome.
Thanks for any help or advice you can give.