Europol Public Information  perform the Framework Contract and/or the Specific  Contract  or  Purchase Order ; In addition to the General Definitions used in this Article, Special Definitions may be defined at  Article I-1 (“Special definitions”).  Page 26 of 79  Europol’s initials:  Contractor’s initials:  General Performance of the Framework Contract  Article II-2  Purchase Order: a simplified form of  Specific Contract  by which Europol may  order goods and/or services under the  Framework Contract ; Request for Offer: a document issued by Europol requesting the  Contractor  (or  several contractors in multiple framework contracts) to  provide a specific offer for goods and/or services for which  the terms are not entirely defined in the Framework  Contract  and/or in the  Contractor’s Tender ; Specific Contract: a contract signed by both parties, under the terms and  conditions of the  Framework Contract , specifying particular  details of purchases;  Substantial error: Contractor’s infringement of a contract provision resulting  from an act or omission, which causes or might cause a loss  to the European Union’s budget; Timesheet: a document confirming attendance and the number of  Working Days/working hours performed by the  Contractor’s  Personnel , together with an explanation of the work performed with sufficient detail to permit Europol to undertake verification and dedication of the work and a  sample may be attached as  Annex to this Framework  Contract and/or  Specific Contract  or  Purchase Order ;  Working Day(s) :  calendar day(s), with the exception of weekends and public  holidays recognised as such by Europol, on which the agreed  work will be carried out. A  Working Day  consists of 8 hours  of work performed between 7:00 and 19:00 excluding travel  to and from Europol and excluding breaks. Regulation (EEC,  Euratom) No 1182/71 of the Council of 3 June 1971, OJ EC  L124/1 will be applied to all periods, dates and time limits in  this  Framework Contract .  2. Europol is not bound by any Contractor’s (including any sub-contractor’s) terms specified in various  documents contained in the Contractor’s Tender at Annex II, such as but not limited to general  terms and conditions, agreements, schedules, order forms etc., unless explicitly mentioned in the  Special Conditions of this  Framework Contract . Where Contractor’s terms are attached to a  Specific  Contract  and/or a  Purchase Order  and where such are not compatible with the  Framework Contract ,  the terms shall be deemed as not applicable.  1. Signature of the  Framework Contract  does not guarantee any actual purchase. Europol is bound only  by  Specific Contracts  or  Purchase Orders  signed by both parties and implementing the  Framework  Contract .