In the event of the simultaneous participation of several trade unions or other representative bodies approved by the workers, a joint representative body will be set up to negotiate, prepare a single draft text and conclude a single collective agreement. Section 14. Application of the collective agreement. A collective agreement is concluded for a period of at least one year and a maximum of three years. Section 9. Warranties and indemnifications during the negotiation period. During the negotiation period, participants as representatives of the Parties and experts invited to participate in the work of the Committees shall be suspended from their main activities and shall receive the applicable average remuneration for a maximum period of three months per year, and their participation in negotiations for the purpose of calculating the service time shall be taken into account.