Is an Executive Doctorate different from a typical PhD with respect to the level of assistance that is permitted on the dissertation? I began tutoring an Executive Doctorate student last fall in a class that he was taking. After that class ended, he was able to begin working on his dissertation and wanted my help for it as well. 

Here arises the problem and the question. He has been asking me for increasing "help" on his dissertation to the point of asking me to read articles and find citations and to rewrite sections of his dissertation to address concerns from his committee. 

My initial thought is that this is something I should not do, but as he is not a typical PhD student, I am unfamiliar with the expectations. So, what exactly is the difference between an Executive Doctorate (also called an Executive PhD.) program, and a typical PhD program, and does that difference allow for him to receive this much assistance on his dissertation? 

More information: Looking a little more, the program he is enrolled in is listed under the Doctoral Programs section of the page listing all of the programs offered by the department.
Based on this article, I would guess the answer is: officially, no.  It seems quite unlikely to me that there is some other standard of intellectual honesty specifically set up for "Executive Doctoral" student, since it is such a new category.  

It certainly sounds to me like this person is asking you do an inappropriate amount of work toward their doctorate; doctoral students aren't expected to be completely isolated (much of my thesis was based on joint work), but asking you to rewrite seems like crossing a line.  It's up to you to decide what you want to do, and whether you feel comfortable with the work.  You could always contact the person's advisor, but you should be prepared for that to burn your bridge with this person.