Abusive head trauma.
A certified center that cares for a child deleted text begin through four years of age deleted text end new text begin under school age new text end must ensure that new text begin the director and all new text end staff persons deleted text begin and volunteers deleted text end new text begin , including substitutes and unsupervised volunteers, new text end receive training on abusive head trauma deleted text begin from shaking infants and young children deleted text end before assisting in the care of a child deleted text begin through four years of age deleted text end new text begin under school age new text end .