CustomValidator OnServerValidate Method Determine Validator ID Received

I am thinking my answer may be no, but wanted to verify if I am able to grab the ID from the CustomValidator in the method that the CustomValidator calls. I say this because I have created a CustomValidator method that does the same thing for multiple date fields. However, I would like to make the RequiredValidator Visible=False for each of the controls, on a case by case basis, so that they don't take up space like they do when they are set to visibility:hidden in the span.

Can I do this? I haven't been able to find anything that even addresses this issue.