A. Instruction on the nature and harmful effects of alcohol, tobacco, narcotic drugs, marijuana, date rape drugs and other dangerous drugs on the human system and instruction on the laws related to the control of these substances and the nonuse and prevention of use and abuse of alcohol, tobacco, narcotic drugs, marijuana, date rape drugs and other dangerous drugs may be included in the courses of study in common and high schools, with emphasis on grades four through nine. Instruction on the nature and harmful effects of alcohol, tobacco, narcotic drugs, marijuana, date rape drugs and other dangerous drugs on a human fetus may be included in the courses of study in grades six through twelve.The instruction may be integrated into existing health, science, citizenship or similar studies and shall meet the criteria for chemical abuse prevention education programs developed pursuant to subsection C of this section.