The Regulation for the health claim for non-digestible carbohydrates for improving glycaemic index is officially published: IMPLEMENTING REGULATION (EU) 2016/854 document.
Condition of use is indicated on page 5 in the ANNEX.
This Regulation shall enter into force on the twentieth day following that of its publication(31-05-2016) in the Official Journal of the European Union.
This Regulation shall be binding in its entirety and directly applicable in all Member States.
In addition to the authorized 13.5 health claim, general health-related well-being claims under article 10.3 are also possible along with the main claim, such as "lower and more balanced blood glucose rise".
CLAIM for non-digestable Carbohydrates:
Consumption of foods/drinks containing <name of all used non-digestible carbohydrates> instead of sugars induces a lower blood glucose rise after their consumption compared to sugar-containing foods/drinks.