On November 27th. in Geneva, the World Health Organisation (WHO) Meeting of Parties on illicit tobacco (MOP4) agreed that the WHO research showed no evidence of a relationship between duty free and illicit trade in tobacco products.
The MOP also agreed that sufficient controls are already in place in most countries for the duty free industry. As a result of this, there was unanimous agreement at MOP4 yesterday that no further action on duty free is necessary under the Illicit Trade Protocol.
https://storage.googleapis.com/protocol-mop4-source/Decisions/fctc-mop-4-6-en.pdf
The decision refers to duty free in the couple of following paragraphs which form the bases for duty free being excluded from the working group.
“Noting that report FCTC/MOP/4/5 states that, with regard to Article 13.2, most of the Parties consulted for the case studies did not identify duty free sales channels as a significant channel for the illicit trade in tobacco products. 
 Taking into account that most of the Parties have implemented measures to control the sale of duty free tobacco products and prevent their diversion into illicit trade channels;”
The decision vindicates the DFWC’ s position that the duty free supply chain is one of the most trusted, transparent and secure in the world. Duty free retailers and suppliers work closely with governments and regulators to ensure that illicit trade cannot gain a foothold in our channel.
Please find the official Press Release here.