The validity of a cross-industry agreement is subject to its signature by one or more representative employee trade union organisations that have received, in the elections taken into account for the measurement of the audience provided for in 3° of article L. 2122-9, at least 30% of the votes cast in favour of organisations recognised as representative at this level, whatever the number of voters, and in the absence of opposition from one or more representative employee trade union organisations having received the majority of the votes cast in favour of the same organisations at these same elections, whatever the number of voters.
Opposition is expressed within a period of fifteen days from the date of notification of this agreement, under the conditions provided for in article L. 2231-8.