Member States shall take the necessary measures, in accordance with their national law, to submit 1-benzylpiperazine (also known as 1-benzyl-1,4-diazacyclohexane, N-benzylpiperazine or — less precisely — as benzylpiperazine or BZP) to control measures proportionate to the risks of the substance, and criminal penalties, as provided for under their legislation complying with their obligations under the 1971 United Nations Convention on Psychotropic Substances.