The EU Tobacco Products Directive (TPD) was adopted in May 2014 and comes into force next year. Key provisions include the standardisation of packaging, a prohibition by 2020 on menthol cigarettes and special rules for e-cigarettes.
The opinion also said an effort by Poland -- the EU's top menthol producer and consumer -- to annul the menthol ban must be dismissed as "none of its arguments ... is well founded".
The TPD requires health warnings that include discouraging images to cover 65 percent of tobacco packages. It stipulates cigarette boxes should be rectangular with at least 20 cigarettes, thereby banning slimmer 10-stick packs more attractive to occasional smokers.
The e-cigarette rules, which the opinion called "relatively moderate," include a duty to notify regulators six months before products go on sale, prohibitions on advertising and sponsorship and a maximum nicotine content for e-liquids of 20 mg/ml.