3.Application of the measures of the responsibility of the parties specified in the present Contract, is not obligatory but may be carried out at the discretion of the Party, in relation to which other Party made the infringement for which the responsibility is covered by the conditions of the Contract. Realization of the right to apply the measures of the responsibility by the Party, in relation to which the infringement is admitted, is carried out by a sending demand indicating the volume and the bases of the responsibility to guilty Party.