Almost everything on the list in the referenced Academia Meta question seems to be related to grading policies -- grading of homework, grading of projects, grading of quizzes, grading of exams. So I will propose:
grading-policy or grading-policies
Maybe some would say that adjusting an exam or quiz date would not fall under that umbrella -- but I personally think it does, indirectly.
Academia SE already has tags for "grades" and "grading." I confess I don't understand the difference. I'm guessing neither one covers what you want, because otherwise you wouldn't be asking!
There is already a tag for "policy," but policy could refer to policies about encouraging and supporting diversity, sexual harassment, sexual conduct between a student and a teaching assistant, plagiarism, lab safety, leave of absence, etc., etc. (I have not looked at the questions that have been tagged with "policy" -- I will.)
Your question here also made mention of the concepts of handicap and adjustment. I can see that these concepts might sometimes overlap orthogonally with a grading-policy tag, since various disabilities might call for adjustments to be made that could result in exceptions being made to a particular grading policy. In the United States, at least, there is already a word for academic adjustments which are made due to a student's disability: accommodations or reasonable accommodations.
There is a whole legal framework in the U.S. for providing academic accommodations for a student with a disability, through a legally binding document called a "Section 504 Accommodation Plan," or "504 Plan," for short. This legal framework applies to both grade school and higher education (although of course there are some nuances). Here are some examples of adjustments that one might see in a 504 plan:
hand in assignments later than the official due date
take exams in a separate location
use proportionally more time for exams
take a 10-minute movement break every 40 minutes during an exam
have access to a portable word processor for writing exams (there might be qualifications to this, such as, turn off the spell checker, turn off the grammar checker, be disconnected from the internet)
large type format
Note that although the 504 plan is a legally binding document, it is not (normally, at least!) drawn up by lawyers or judges. (Also note that one could also, in principle, speak of "504 accommodations" in the workplace, or in health care.)
Careful documentation must be submitted to the university for a student to establish 504 eligibility, and for specific accommodations to be included in the student's 504 plan. The federal government (I'm still talking about the U.S. here) has provided the legal framework, but each educational institution must establish its own 504 policy and procedures, within that framework.
The government website doesn't do a great job of providing a concise overview; colleges and universities in the U.S. vary in the amount and extent of explanation they provide on their websites regarding their 504 policy and procedures. Here's a reasonably concise yet informative one from Penn State: http://equity.psu.edu/student-disability-resources/considering-penn-state/reasonable-accommodations
Academia SE has international scope, of course. I have tried to find out what the analogous terminology, legal framework, and customs are in Europe, through questions posed on Academia SE and Law SE, but so far these attempts have gotten me... absolutely NOWHERE. Therefore, I would suggest that Academia SE begin with the following:
academic-accommodations or reasonable-accommodations
Hopefully, over time, this could be given some tag synonyms to incorporate the terminology used in other parts of the world.
I have to be honest, I proposed a tag of this sort a while back -- see https://academia.meta.stackexchange.com/questions/2050/need-new-tag-for-504-plan-and-or-504-accommodations; the idea didn't get any traction. I hope that won't prevent you from seriously considering the idea.