Contract number: [ complete ]  Contract conditions of December 2015  The contractor must be liable to the contracting authority for any lack of conformity which  exists at the time the supplies are verified.  In case of lack of conformity, without prejudice to Article II.14 on liquidated damages  applicable to the total price of the supplies concerned, the contracting authority is entitled:  (a) either to have the supplies brought into conformity, free of charge, by repair or  replacement;  (b) or to have an appropriate reduction made in the price.  Any repair or replacement must be completed within a reasonable time and without any  significant inconvenience to the contracting authority, taking account of the nature of the  supplies and the purpose for which they are required by the contracting authority.  The term ‘free of charge’ in paragraph (b) refers to the costs incurred to bring the supplies  into conformity, particularly the cost of postage, labour and materials.  II.4.12 Assembly  II.4.13 Services provided to supplies  II.4.14 General provisions concerning supplies  If required by the tender specifications, the contractor must assemble the supplies  delivered within a period of one month unless otherwise specified in the special  conditions.  Any lack of conformity resulting from incorrect installation of the supplies must be  deemed to be equivalent to lack of conformity of the supplies if installation forms part of  the contract and the supplies were installed by the contractor or under its responsibility.  This applies equally if the product was to be installed by the contracting authority and was  incorrectly installed owing to a shortcoming in the installation instructions.  If required by the tender specifications, services to supplies must be provided accordingly.  The supplies must be packaged in strong boxes or crates or in any other way that ensures  that the contents remain intact and prevents damage or deterioration. Packaging, pallets,  etc., including contents, must not weigh more than 500 kg.  Unless otherwise specified in the special conditions or in the tender specifications, pallets  must be considered as one-way packaging and must not be returned. Each box must be  clearly labelled with the following information:  - EC code number of article.  - number and date of specific contract;  - date of delivery;  - description of contents;  - name of contractor;  - name of contracting authority and address for delivery;  (a) Packaging  (b) Guarantee  15 