The implementation of this option must, however, be expressly foreseen by a collective agreement or an agreement between the two sides of industry at national or regional level or, in accordance with national law and/or practice,, by means of collective agreements or agreements concluded between the two sides of industry at the appropriate level .
Tomēr šīs iespējas īstenošana konkrēti jāparedz koplīgumā vai līgumā, kas noslēgts starp sociālajiem partneriem nacionālā vai reģionālā līmenī, vai arī saskaņā ar valsts tiesību aktiem un/ vai praksi koplīgumu vai līgumu veidā, kas atbilstošā līmenī noslēgti starp sociālajiem partneriem.