(iv) A requirement that all marihuana sold through marihuana retailers and marihuana microbusinesses include on the exterior of the marihuana packaging the following warning printed in clearly legible type and surrounded by a continuous heavy line:
WARNING: USE BY PREGNANT OR BREASTFEEDING WOMEN, OR BY WOMEN PLANNING TO BECOME PREGNANT, MAY RESULT IN FETAL INJURY, PRETERM BIRTH, LOW BIRTH WEIGHT, OR DEVELOPMENTAL PROBLEMS FOR THE CHILD.