(1m) No person may conduct, maintain, manage, or operate a school lunchroom that is in a school that is participating in the national school lunch program under 42 USC 1751 to 1769j for which food service is directly provided by the school unless the operator or manager of the lunchroom, or his or her designee, is a certificate holder. For purposes of this subsection, the “operator or manager of the lunchroom” is the individual responsible for the administration of food services for a private school, charter school established under s. 118.40 (2r), or school district. A private school, charter school established under s. 118.40 (2r), or school district complies with the requirements of this subsection if the school or school district has one certificate holder.