Section 32. (a) Any person who knowingly or intentionally manufactures, distributes, dispenses, or possesses with intent to manufacture, distribute or dispense a controlled substance in Class A of section thirty-one shall be punished by imprisonment in the state prison for not more than ten years or in a jail or house of correction for not more than two and one-half years or by a fine of not less than one thousand nor more than ten thousand dollars, or by both such fine and imprisonment.
(b) Any person convicted of violating this section after one or more prior convictions of manufacturing, distributing, dispensing or possessing with the intent to manufacture, distribute, or dispense a controlled substance as defined by section thirty-one of this chapter under this or any prior law of this jurisdiction or of any offense of any other jurisdiction, federal, state, or territorial, which is the same as or necessarily includes the elements of said offense shall be punished by a term of imprisonment in the state prison for not less than 31/2 nor more than fifteen years. No sentence imposed under the provisions of this section shall be for less than a mandatory minimum term of imprisonment of 31/2 years and a fine of not less than two thousand and five hundred nor more than twenty-five thousand dollars may be imposed but not in lieu of the mandatory minimum 31/2 year term of imprisonment, as established herein.
(c) Any person serving a mandatory minimum sentence for violating any provision of this section shall be eligible for parole after serving one-half of the maximum term of the sentence if the sentence is to the house of correction, except that such person shall not be eligible for parole upon a finding of any 1 of the following aggravating circumstances:
(i) the defendant used violence or threats of violence or possessed a firearm, rifle, shotgun, machine gun or a weapon described in paragraph (b) of section 10 of chapter 269, or induced another participant to do so, during the commission of the offense;
(ii) the defendant engaged in a course of conduct whereby he directed the activities of another who committed any felony in violation of chapter 94C; or
(iii) the offense was committed during the commission or attempted commission of a violation of section 32F or section 32K of chapter 94C.
A condition of such parole may be enhanced supervision; provided, however, that such enhanced supervision may, at the discretion of the parole board, include, but shall not be limited to, the wearing of a global positioning satellite tracking device or any comparable device, which shall be administered by the board at all times for the length of the parole.