Are there consequences of disabling late policy mid-semester

[HeidiOberrieder]

I have a multi-part question. I have quizzes that allow unlimited attempts (since they pull from a very large question set) with the highest score showing in the gradebook. I also set a due date, but only because I had assumed that even if a student took it "late" their previous attempts earning a top score will remain in the gradebook; however, I now know that the late attempt causes all attempts to be subject to the late policy. If I disable the late policy, what will happen to the quiz scores? My main concern is that the scores will disappear, which I definitely do not want to happen.  My reasoning for having a due date was to encourage students to make attempts during the active module, yet students have access to quiz as a study tool for the final exam. 

[JeffCampbell]

Typically, a Late Policy implementing a deduction in grade just applies penalty to the actual grade. It does record the original grade, then the penalty is subtracted. When you go into Grade Settings, the following warning is given next to the Late Policy settings:

"Changing the late policy will affect previously graded submissions."

So if you remove the late policy, it should just remove the penalty and revert grades to the actual earned # of points. But it will do it to ALL grades, not just those submitted after removal of the policy. One solution around this is to go into Speedgrader, which will list the penalty, and increase the grade by the penalty. I just checked this on my end. A student had a 15/15 with a -0.9 penalty. When I changed the grade to 15.9, the final grade was listed as 15. Time consuming if you have a lot of students, but this would allow you to remove the penalty from the desired assignment while keeping penalties on other assignments intact.