Building & Civil Engineering Rules & Regulations of Oman Page 46 may be used, in whole or in part, or not at all, at the direction of the Engineer, who shall consult with the Employer prior to the issue of an instruction to this expenditure. The Contract Price shall include only such sums in respect of the work, supply or s ervices to which such Provisional Sums relate as the Engineer shall approve or determine in accordance with this Clause. 2. Use of Provisional Sums In respect of every Provisional Sum the Engineer shall have power to order: A. Work to be executed, including g oods, materials or services to be supplied by the Contractor. The Contract Price shall include, the value of such work executed and/or such goods, materials or services supplied, determined in accordance with Clause 52 hereof. B. Work to be executed or goo ds, materials, or services to be supplied by a nominated Sub Contractor as hereinafter defined. The sum to be paid to the Contractor therefor shall be determined and paid in accordance with Clause 59 (4) hereof. C. Goods and materials to be purchased by th e Contractor. The sum to be paid to the Contractor therefor shall be determined and paid in accordance with Clause 59 (4) hereof. 3. Production of Documents The Contractor shall when required by the Engineer, produce all quotations, invoices, vouchers and acc ounts or receipts in connection with expenditure in respect of Provisional Sums. Nominated Sub Contractors Clause Fifty nine 1. Definition of Nominated Subcontractors All specialists, merchants, tradesmen and others executing any work or supplying any goods, materials, or services for which Provisional Sums are included in the Contract, who may have been or be nominated or selected or approved by the Employer or the Engineer, and all persons to whom by virtue of the provisions of the contract the Contractor i s required to sublet any work shall in the execution of such work or the supply of such goods, materials or services, be deemed to be subcontractors employed by the Contractor and are referred to in this Contract as "Nominated Sub Contractors". 2. Objection t o Nomination by Nominated Subcontractors The Contractor shall not be required by the Employer or the Engineer or be deemed to be under any obligation to employ any nominated Subcontractor against whom the Contractor may raise reasonable objection, or who s hall decline to enter into a sub contract with the Contractor containing provisions: A. That in respect of the work, goods, materials or services covered by the subcontract, the nominated Subcontractor shall undertake towards the Contractor the like obliga tions and liabilities as are imposed on the Contractor towards the Employer by the terms of the Contract and shall save harmless and indemnify the Contractor from and against the same and from all claims, proceedings, damages, costs, charges and expenses w hatsoever arising out of or in connection therewith, or arising out of or in connection with any failure to discharge such obligations or to meet such liabilities. B. That the nominated Subcontractor shall save harmless and indemnify the Contractor from an d against any negligence by the nominated Subcontractor, his agents, workmen and servants and from and against any misuse by him or them of any Constructional Plant or Temporary Works provided by the Contractor for the purposes of the Contract and from all claims as aforesaid. Building & Civil Engineering Rules & Regulations of Oman Page 47 3. Express Provision on Design Requirements If in connection with any Provisional Sum the services to be provided include any matter of design or specification of any part of the Permanent Works or of any equipment or plant to be incorpo rated therein, such requirements shall be expressly stated in the Contract and shall be included in any nominated Subcontract. The nominated Sub contract shall specify that the nominated Subcontractor providing such services shall save harmless and indemni fy the Contractor from and against the same and from all claims, proceedings, damages, costs, charges and expenses whatsoever arising out of or in connection with any failure to discharge such obligations or to meet such liabilities. 4. Payments to Nominated Subcontractors For all work executed or goods, materials, or services supplied by any nominated Subcontractor, there shall be included in the Contract Price: A. the actual price paid or due to be paid by the Contractor, on the direction of the Engineer, an d in accordance with the Subcontract; B. the sum, if any, entered in the Bill of Quantities, for labour supplied by the Contractor in connection therewith, or if ordered by the Engineer pursuant to Clause 58 (2) B hereof, as may be determined in accordance with Clause 52 hereof; C. in respect of all other charges and profit, a sum being a percentage rate of the actual price paid or due to be paid, calculated where provision has been made in the Bill of Quantities for a rate to be set against the relevant Pr ovisional Sum, at the rate inserted by the Contractor against that item. Only where no such provision has been made in the Bill of Quantities shall the Contractor insert a rate in the Appendix to the Tender. 5. Certification of Payments to Nominated Sub Contr actors Before issuing, under Clause 60 hereof, any certificate, which includes any payment in respect of work done or goods, materials or services supplied by any nominated Subcontractor, the Engineer shall be entitled to demand from the Contractor reasona ble proof that all payments, less retentions, included in previous certificates in respect of the work or goods, materials or services of such nominated Subcontractors have been paid or discharged by the Contractor, in default whereof, unless the Contracto r shall A. inform the Engineer in writing that he has reasonable cause for withholding or refusing to make payments and B. produce to the Engineer reasonable proof that he has so informed such nominated Subcontractor in writing. the Employer shall be entit led to pay to such nominated Subcontractor direct, upon the certificate of the Engineer, all payments, less retentions, provided for in the Subcontract, which the Contractor has failed to make to such nominated Subcontractor and to deduct by way of set off the amount so paid by the Employer from any sums due or which may become due from the Employer to the Contractor. Provided always that, where the Engineer has certified and the Employer has paid direct as aforesaid, the Engineer shall in issuing any furth er certificate in favour of the Contractor deduct from the amount thereof the amount so paid direct as aforesaid, but shall not withhold or delay the issue of the certificate itself when due to be issued under the terms of the Contract. 6. Specification of Li abilities of Nominated Subcontractors In the event of a nominated Sub Contractor, as hereinbefore defined, having undertaken towards the Contractor in respect of the work executed, or the goods, materials or services supplied by such Building & Civil Engineering Rules & Regulations of Oman Page 48 nominated Subcontracto r, any continuing obligation extending for a period exceeding that of the Period of Maintenance under the Contract, the Contractor shall at any time, after the expiration of the Period of Maintenance, assign to the Employer, at the Employer's request and c ost, the benefit of such obligation for the remaining duration of such period. Certificates and Payments Clause Sixty 1. Certificates and Payments Unless otherwise provided, payments shall be made at monthly intervals in accordance with the conditions set out below. 2. Advance Payment Certificate On signing the Form of Agreement and in exchange for the Performance Bond and a separate guarantee for the amount of the Advance Payment, the Contractor shall receive from the Engineer an Advance Payment Certificate f or an amount equal to 10 per cent of the Contract Value, less any sum for contingencies included in the Contract Value. The guarantee for the full amount of the Advance Payment shall be from an insurance company or bank registered in the Sultanate of Oman. The conditions of the guarantee shall bind the Guarantor to indemnify and pay to the Employer any part of the Advance Payment which remains not repaid by the Contractor to the Employer and which the Contractor has failed to repay in accordance with this s ub clause. Any Advance Payment made by the Employer shall be recovered by the deduction from each interim certificate of 10 per cent of the estimated value of the Permanent Works, executed during the period to which the interim certificate applies, but so that at the completion of the Works, the Contractor shall have repaid the amount of the Advance Payment in full. This guarantee shall be valid for twelve months or until the full recovery of the advance payment whichever is the later. If; however, the adva nce payment is recovered in full prior to the end of the twelve month period, the Contractor may make application to the Ministry of Finance for the release of the guarantee, which shall not be unreasonably withheld. Where the Contract ends under Clause 63 or 65 hereof, the Employer may deduct the balance of the Advance Payment outstanding from any monies due or which may become due to the Contractor or the Contractor shall upon demand pay to the Employer the amount of such balance and it shall be deemed a debt due from the Contractor to the Employer and shall be recoverable accordingly from the Contractor or from the Guarantor. 3. Monthly Statements The Contractor shall submit to the Engineer after the end of each month a statement, in the form approved by the Engineer, showing: — A. the estimated value in accordance with the Contract of the Permanent Work executed on the Site and forming part of the Works; B. a list of any goods or materials delivered to the Site for use but not yet incorporated in the Permane nt Works and their value. (Such goods or materials shall be protected against all kinds of damage including deterioration to the approval of the Engineer); C. the estimated amounts to which the Contractor considers himself entitled in connection with all other matters for which provision is made under the Contract, including any Temporary Building & Civil Engineering Rules & Regulations of Oman Page 61 FORM OF ADVANCE PAYMENT BOND Ministry of Finance P.O. Box 506 Muscat Sultanate of Oman. Advance Payment Bond No ............................ Whereas Messrs ...................................................................................................... ........ (to be referred to hereinafter as Contractor) have been awarded a Contract dated for the construction, maintenance and completion of ......................................................................................... ........................................ for an amount of RO .............. (Rials Omani ................................) and in view of th e fact that you shall pay to the Contractor an advance instalment of RO ..........., equivalent to ........ % of the Value of the Contract, we, the undersigned ....................................... ............................................................................................................................. . whose address is .......................................................................................... . undertake by virtue of this guarantee that we shall pay to you an amount not exceeding RO ........ upon your first written demand without reverting to the contractor or entertaining his objections. It is understood that our liability towards you shall be red uced, corresponding to the amounts refunded to you by the Contractor as specified in the Certificates and Payments against the said advance payment. The validity of this bond commences on ............ and ends on ............... or till the full payment of the advance insta lment, whichever of the two dates fall later. This bond shall be returned to us upon the conclusion of the period of its validity or upon the fulfilment our liability, whichever of the two materializes first. Authorized Signatories (To be issued by a bank registered in the Sultanate) Building & Civil Engineering Rules & Regulations of Oman Page 62 FORM OF PERFORMANCE BOND Ministry of Finance P.O. Box 506 Muscat Sultanate of Oman. Performance Bond No .................. Whereas Messrs ................................................................................................................ (to be referred to hereinafter as Contractor) have been awarded a Contract dated ............. for the construction, maintenance and completion of ........................................................................... ....................................................................................................................................... ........................................................................ for an amount of RO .................................. (Rials Omani ............................................................... ........................), we the undersigned ............................................................................................................... whose address is .........................................................................................................hereby inform you that by virtue of this bond we shall be liable to the government of the Sultanate of Oman represented by the Ministry of Finance in Muscat in the sum of an amount of RO ........................ equivalent to ..........% of the Value of the Contract. We undertake to pay the amount to your order without any restriction or condition upon your first written demand without reverting to the Contract or or entertaining any objections from him, provided such demand is received by us before ................................................................................. The validity of this bond commences on ...................... and ends on ............................ After this date, our liability shall cease automatically. This bond shall be returned to us upon the conclusion of the period of its validity or upon the fulfilment our liability, whichever of the two materializes first. Authorized Signatories (To be issued by a bank registered in the Sultanate)