(4) a user manual;  (5) implementation  Documentation .  IV.8.5.3.  The manuals and the  Documentation  shall be in the file format of a word processing  Software  used by the contracting authority and prepared so that they may be published on the contracting  authority’s intranet.  IV.8.5.4.  The user manuals and the  Documentation  shall be supplied in English, unless otherwise  agreed.  IV.8.5.5.  The contractor shall update and, if necessary, replace the user manuals and  Documentation  files for the maximum length of the framework contract.  IV.8.6.1.  Where the specific contract mentions interfaces that need to be observed, the contractor shall  not modify such interfaces without the contracting authority’s written agreement. Such  agreement shall not be unreasonably withheld.  IV.8.6.2.  Where the  Commissioned software  supplied utilises  Software  from a third party and where that  Software  is updated, the contractor shall adapt the  Commissioned software  in accordance with  terms jointly agreed.  IV.8.6.3.  The contractor shall ensure that all the  Commissioned software  supplied under the framework  contract is compatible and operates by means of interfaces with all other  Software  specified in  the framework contract.  Page 38 of 40  IV.8.6.  Interfaces and  Compatibility