f. A requirement that each school have a procedure for the administration to promptly investigate in a timely manner and determine whether bullying has occurred, and that such procedure include investigation of such instances, including a determination of whether the target of the bullying was targeted or reports being targeted wholly or in part due to the target’s race, age, marital status, creed, religion, color, sex, disability, sexual orientation, gender identity or expression, or national origin. This subsection does not preclude schools from identifying other reasons or criteria why a person is a target of bullying.