(a) Except as provided by this chapter, it is unlawful for a person to manufacture a Schedule III controlled substance.
(b)
(1) A person who manufactures less than twenty-eight grams (28g) by aggregate weight, including an adulterant or diluent, of a Schedule III controlled substance upon conviction is guilty of a Class C felony.
(2) A person who manufactures twenty-eight grams (28g) or more but less than two hundred grams (200g) by aggregate weight, including an adulterant or diluent, of a Schedule III controlled substance upon conviction is guilty of a Class B felony.
(3) A person who manufactures two hundred grams (200g) or more by aggregate weight, including an adulterant or diluent, of a Schedule III controlled substance upon conviction is guilty of a Class A felony.