(1) It is legislative intent that parental involvement in all aspects of a child’s education in the public school system remain a priority. Substance abuse prevention programs and counseling for students attending public schools are no exception. Consequently, it is the duty of the board of trustees of each school district, including specially chartered school districts, and governing boards of charter schools, to adopt and implement policies specifying how personnel shall respond when a student discloses or is reasonably suspected of using or being under the influence of alcohol or any controlled substance defined by section 37-2732C, Idaho Code. Such policies shall include provisions that anonymity will be provided to the student on a faculty "need to know" basis, when a student voluntarily discloses using or being under the influence of alcohol or any controlled substance while on school property or at a school function, except as deemed reasonably necessary to protect the health and safety of others. Notification of the disclosure and availability of counseling for students shall be provided to parents, the legal guardian or child’s custodian. However, once a student is reasonably suspected of using or being under the influence of alcohol or a controlled substance in violation of section 37-2732C, Idaho Code, regardless of any previous voluntary disclosure, the school administrator or designee shall contact the student’s parent, legal guardian or custodian, and report the incident to law enforcement. The fact that a student has previously disclosed use of alcohol or a controlled substance shall not be deemed a factor in determining reasonable suspicion at a later date.