85.— Section 29 of the Act of 1977 is amended by the substitution of the following subsection for subsection (3):

“(3) In any proceedings for an offence under section 15 or 15A, or subsection (1)(d) of section 15C, of this Act, a defendant may rebut the presumption raised by subsection (2) of the said section 15 or 15A or subsection (3) of the said section 15C, as the case may be, by showing that at the time of the alleged offence, he or she was by virtue of regulations made under section 4 of this Act lawfully in possession of the controlled drug or drugs to which the proceedings relate.”.