1. Where the operator of an incumbent installation has submitted a valid application for free allocation in accordance with Article 4, the Member State concerned shall, based on the data collected in accordance with Article 14, calculate, for each year, the number of emission allowances allocated free of charge from 2021 onwards to that installation.

2. For the purpose of the calculation referred to in paragraph 1, Member States shall first determine the preliminary annual number of emission allowances allocated free of charge for each sub-installation separately, as follows:

(a) for product benchmark sub-installations, the preliminary annual number of emission allowances allocated free of charge for a given year shall correspond to the value of that product benchmark for the relevant allocation period, adopted in accordance with Article 10a(2) of Directive 2003/87/EC, multiplied by the relevant product-related historical activity level;