Versions of Massachusetts General Laws ch. 94C sec. 31 - Classes of controlled substances; establishment of criminal penalties for violations of this chapter on LawServer 2023 Massachusetts General Laws ch. 94C sec. 31 – Classes of controlled substances; establishment of criminal penalties for violations of this chapter 2022 Massachusetts General Laws ch. 94C sec. 31 – Classes of controlled substances; establishment of criminal penalties for violations of this chapter 2020 Massachusetts General Laws ch. 94C sec. 31 – Classes of controlled substances; establishment of criminal penalties for violations of this chapter 2019 Massachusetts General Laws ch. 94C sec. 31 – Classes of controlled substances; establishment of criminal penalties for violations of this chapter 2017 Massachusetts General Laws ch. 94C sec. 31 – Classes of controlled substances; establishment of criminal penalties for violations of this chapter 2016 Massachusetts General Laws ch. 94C sec. 31 – Classes of controlled substances; establishment of criminal penalties for violations of this chapter 2015 Massachusetts General Laws ch. 94C sec. 31 – Classes of controlled substances; establishment of criminal penalties for violations of this chapter 2014 Massachusetts General Laws ch. 94C sec. 31 – Classes of controlled substances; establishment of criminal penalties for violations of this chapter 2013 Massachusetts General Laws ch. 94C sec. 31 – Classes of controlled substances; establishment of criminal penalties for violations of this chapter 2009 Massachusetts General Laws ch. 94C sec. 31 – Classes of controlled substances; establishment of criminal penalties for violations of this chapter