Spivack D. (ed.) Feasibility Study on Opium Licensing in Afghanistan, Kabul, 2005. p. 85–86.). Many critics of the Convention cite this as one of its primary limitations and the World Health Organization is currently attempting to increase prescription of poppy-based drugs and to help governments of emerging countries in particular alter their internal regulations to be able to demand poppy-based medicines according to the convention's provisions (see the WHO "Assuring Availability of Opioid Analgesics for Palliative Care"). The Senlis Council, a European drug policy thinktank, proposes creating a second-tier supply system that would complement the existing system without altering the balance of its relatively closed supply and demand system. The council, who support licensing poppy cultivation in Afghanistan to create Afghan morphine, believe the opium supply in this country could go a long way to easing the pain relief needs of sufferers in emerging countries by producing a cheap poppy-based medicine solution (see Senlis Council: "Poppy for Medicine."