The main purpose of this legislation is to address the growing problem of fentanyl and its related substances, which are increasingly linked to overdose deaths and substance abuse. The law aims to classify these substances as Schedule I controlled substances under the Controlled Substances Act, which is the most restrictive category for drugs. This classification is intended to enhance regulation and control over these dangerous substances. Key provisions of the law include the addition of fentanyl-related substances to Schedule I of the Controlled Substances Act.