Data shall be collected on: 1. the local unit to which the sampled employees are attached, as follows: the region of workplace, size, economic activity classified according to NACE Rev. 1, the form of financial and economic control within the meaning of Commission Directive 80/723/EEC of 25 June 1980 on the transparency of financial relations between Member States and public undertakings (3), and the type of collective pay agreement in force ...