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���������H���̹��팣�IӢ�Z��x�x��/���H���̹����̌W������������5. Amendments to Tender Documents����It is possible that explanations�� revisions�� additions or deletions to the documents issued to tenderers may be necessary during the tendering period. Tenderers should be told how these will be dealt with�� the normal method being by formal addenda. If a tenderer is in doubt about the meaning of some item in the Tender documents�� he should be advised to notify the Engineer not later than a given number of days ��e. g. 42 days�� before the Tender submission date. The Engineer will then issue to all tenderers an explanation in the form of an addendum. Each addendum should be accompanied by a receipt form which must be returned so that the Employer and the Engineer have confirmation that each tenderer has received all the necessary information. Failure to acknowledge receipt of an addendum may result in rejection of a Tender. The addenda become part of the Tender documents and the numbers issued should be inserted by tenderers in the space provided in paragraph 1 of the form of Tender.����Tenderers would normally be required to submit their offers strictly in accordance with the requirements of the Tender documents. If tenderers are permitted to offer an alternative Tender�� any departure from the documents issued to tenderers should be clearly identified and detailed. The option to submit alternative Tenders may make the evaluation process difficult.����6. Currency Requirements and Exchange Rates����Tenderers should be required to give notice to the Employer of the various currencies in which they may wish to be paid if the Contract is awarded to them. This information should be supplied as soon as possible after invitations to tender have been issued and not less than a given number of days ��e.g�� 42 days�� before the Tender submission date.����The Employer may wish to specify in the Instructions to Tenderers that payments will be made only in the currencies of the countries from which the goods and services are to be acquired.����The Tender documents should include a schedule in which tenderers record the sums in the various approved currencies that together constitute their total Tender sum. This schedule becomes part of the Contract when awarded.����It is common practice to require tenderers to submit their Tenders in a single currency-usually of the country in which the Works are to be executed. If this is the case it is necessary to define the rates of exchange which have been used to convert the various currencies�� in which payment is required�� into a single currency unit. As more than one tenderer may request part payment in one particular currency�� it is preferable that the exchange rates to be used should be consistent and�� therefore�� that they should be defined by the Employer and notified by him�� or the Engineer on his behalf�� to each tenderer a reasonable time before the date of submission. In accordance with Sub-Clause 72. 2 of the Conditions of Contract�� these rates shall be stated in Part II or �� if not so stated�� shall be those prevailing�� as determined by the Central Bank of the country in which the works are to be executed�� on the date 28 days prior to the latest date for the submission of Tenders or as provided for in the Tender. The rates quoted are incorporated in the Contract when awarded.����In order to assist in forward budgeting it is useful to request tenderers to provide an estimate of the payments to be made by the Employer to the Contractor during the period of the Contract�� preferably in quarterly periods.����The estimate of payments referred to above does not become a part of the Contract and should not be regarded as binding. The figures may have to be reviewed and adjusted as the work proceeds. Expenditure under Provisional Sums will affect the figures�� and so also will changes in the source of supply of materials and modifications to the programme or variations of the Works.��������