That's a very interesting question. BAP is a subclinical condition. I'm not sure whether you can, strictly speaking, have a subclinical condition in conjunction with a clinical condition–how do you know that the features of the subclinical condition aren't actually symptoms of the clinical condition? (And the word "comorbid" maybe doesn't quite fit–does a subclinical condition really fit under the definition of "morbid"?)

ADHD and ASD have a lot of overlap. A significant minority of individuals with ADHD (20-30%) have a substantial degree of autistic traits. Many of that 20-30% would have enough for a comorbid ASD diagnosis, but not all of them. If you zero in on the individuals with ADHD who have substantial autistic traits but not quite enough to justify the comorbid diagnosis of ASD – do you say those individuals have ADHD with BAP? Or do you say that they just have ADHD, and that the varied symptoms of ADHD can sometimes include autistic traits?