Currently, when Enforce TK Birth Dates setting is on for Online Enrollment, a message pops up saying "Please enter a valid age in order to continue" if the student's birth date does not fall within the TK birth date ranges. But the parent is able to change the grade level to Kindergarten, or a different grade level in order to continue the enrollment process. The setting allows the parent to bypass the TK birth date rules by simply changing the grade level for their student to a higher grade, when their student isn't even eligible for TK.

This idea is to not allow the parent to change the grade level if their student's designated grade level is TK based on the student's birth date. If the student is not old enough for TK, they definitely are not old enough to attend Kindergarten, etc.