English to Italian Law/Patents Law: Taxation & Customs Contrabbando di sigarette

Come rendere meglio quest'idea di "coinvolgimento mutevole"? O forse significa che in realtà il problema del contrabbando non riguarda singoli paesi in particolare?

Furthermore, there also seems to be an upsurge in illicit tobacco manufacturing inside the EU, which is a hypothesis supported by large-scale seizures of raw tobacco and the discovery of numerous illicit tobacco factories.

In increasing illicit production inside the EU, smugglers may be reacting to more stringent monitoring of the EU’s external borders.
According to the Polish authorities more than 40 factories were discovered in Poland alone in 2016, with an estimated combined capacity to produce several billion cigarettes per year.
The countries identified as key source and transit countries in the 2013 Strategy remain a source of concern, although the involvement of individual countries seems to be ** shifting **. There now seems to be more diverse sourcing in East Asia, whereas smuggling from China may have declined. Moreover, the weakening of governance structures in countries such as Libya facilitates smuggling in the Mediterranean. Smuggling of Belarusian cheap whites, and transit and illicit production activities in the free zones in the UAE, remain of particular concern.