The validity of a branch agreement or a professional agreement is subject to it being signed by one or more representative employee trade union organisations having received, in the elections taken into account for the measurement of the audience provided for in 3° of article L. 2122-5 or, where applicable, in the elections referred to in article L. 2122-6, at least 30% of the votes cast in favour of organisations recognised as representative at this level, regardless of the number of voters, and in the absence of opposition from one or more representative employee trade union organisations that received a majority of the votes cast in favour of the same organisations at these same elections, regardless of the number of voters.
Opposition is expressed within a period of fifteen days from the date of notification of this agreement or convention, under the conditions laid down in article L. 2231-8.