Regulation (EU) 1007/2011
Fibre composition is law now
To describe the composition of a textile product you may use only the names listed in Annex I. This is not a future deadline: it has been in force for years, and it is enforced by the Ministry of Enterprises and Made in Italy, which relies on the Chambers of Commerce (Legislative Decree 190/2017, art. 6).
FormulaPass compares every fibre against the names allowed by Annex I and checks that the declared percentages add up. When the data you hold is not enough to decide, it tells you instead of choosing for you.