I am very grateful to my noble friend for giving way. How does he deal with the objection raised by Professor Iversen and his colleagues on the ACMD in their letter of 2 July? The professor warns that:
“The psychoactivity of a substance cannot be unequivocally proven”.
He goes on to say how difficult it would be to demonstrate in court that a particular substance was indeed psychoactive. He also says:
“It is almost impossible to list all possible desirable exemptions under the Bill”.
Are those two objections not very serious ones to the legislation? What is my noble friend’s response to Professor Iversen?