Instruct: Given a statement, retrieve articles that support it
Query: 
If the delivery of the subject matter of work performed is required, the contractor may not claim the remuneration until and unless he/she has delivered the same.


Article 633
Remuneration must be paid simultaneously with delivery of the subject matter of work performed;provided, however, that if no delivery of a thing is required, the provisions of Article 624, paragraph (1) apply mutatis mutandis..


Article 634
In the following cases, if the party ordering work receives any benefit from the performance of any divisible portion of the outcome of the work that the contractor has already completed, that portion is deemed to be the completed work; in this case, the contractor may demand remuneration in proportion to the benefit to be received by the party ordering work:
(i) if the contractor is no longer able to complete the work due to any grounds not attributable to the party ordering work; or
(ii) if the contract for work is cancelled before the completion of work.
Article 536
(1) If the performance of an obligation becomes impossible due to grounds not attributable to either party, the obligee may refuse to perform counter-performance.
(2) If the performance of an obligation becomes impossible due to grounds attributable to the obligee, the obligee may not refuse to complete counter-performance. In such a case, if the obligor benefits from being released from that obligation, the obligor must reimburse the obligee for the benefit..


Article 641
The party ordering work may cancel the contract at any time whilst the contractor has not completed the work by paying compensation for loss or damage..


Article 665
The provisions of Articles 646 through 648, Article 649, and Article 650, paragraphs (1) and (2) apply mutatis mutandis to bailments.
Article 648
(1) In the absence of any special agreements, the mandatary may not claim remuneration from the mandator.
(2) If a mandatary is to receive remuneration, the mandatary may not claim this until after having performed the mandated business;provided, however, that if the remuneration is specified with reference to period, the provisions of Article 624, paragraph (2) apply mutatis mutandis.
(3) In the following cases, the mandatary may demand remuneration in proportion to the performance already completed:
(i) if the mandatary is no longer able to perform the mandated business due to any grounds not attributable to the mandator; or
(ii) if the mandate is terminated during the course of performance.
Article 536
(1) If the performance of an obligation becomes impossible due to grounds not attributable to either party, the obligee may refuse to perform counter-performance.
(2) If the performance of an obligation becomes impossible due to grounds attributable to the obligee, the obligee may not refuse to complete counter-performance. In such a case, if the obligor benefits from being released from that obligation, the obligor must reimburse the obligee for the benefit..


Article 400
If the subject matter of a claim is the delivery of a specific thing, the obligor must retain the thing with the due care of a prudent manager, which is determined in light of the contract or other sources of claims and the common sense in the transaction, until the delivery..


Article 536
(1) If the performance of an obligation becomes impossible due to grounds not attributable to either party, the obligee may refuse to perform counter-performance.
(2) If the performance of an obligation becomes impossible due to grounds attributable to the obligee, the obligee may not refuse to complete counter-performance. In such a case, if the obligor benefits from being released from that obligation, the obligor must reimburse the obligee for the benefit..


Article 593
A loan for use becomes effective if one of the parties promises to deliver a certain thing, and the other party promises to return the thing when the contract is terminated after the other party gratuitously uses and makes profit of the borrowed thing.
Article 400
If the subject matter of a claim is the delivery of a specific thing, the obligor must retain the thing with the due care of a prudent manager, which is determined in light of the contract or other sources of claims and the common sense in the transaction, until the delivery..


Article 637
(1) In the case prescribed in the main clause of the preceding Article, if the party ordering work fails to notify the contractor of the non-conformity to the terms of the contract within one year from the time when the party becomes aware of it, the party ordering work may not demand cure of the non-conformity of performance, demand a reduction of the remuneration, claim compensation for loss or damage, or cancel the contract.
(2) The provisions of the preceding paragraph do not apply if the contractor knew or did not know due to gross negligence the non-conformity referred to in that paragraph at the time when the contractor delivers the subject matter of work (in the case of the subject matter of work that is not required to be delivered, when the work is finished)..


Article 410
If a performance included in the subject matter of a claim is impossible, and the impossibility is by negligence of the party that has the right to choose, the claim exists to the extent of the remaining performances..


Article 642
(1) If the party ordering work receives an order commencing bankruptcy proceeding, the contractor or the bankruptcy trustee may cancel the contract;provided, however, that this does not apply to the cancellation of the contract by the contractor after the work is completed.
(2) In the case prescribed in the preceding paragraph, the contractor may participate in the distribution of the bankruptcy estate with respect to the remuneration for the work already completed and expenses not included therein.
(3) In the cases referred to in paragraph (1), claims for compensation for loss or damage suffered as a result of the cancellation of the contract are permitted only for contractors under contracts cancelled by the bankruptcy trustee. In such a case, the contractors participate in the distribution of the bankruptcy estate with respect to such compensation for loss or damage..


Article 648
(1) In the absence of any special agreements, the mandatary may not claim remuneration from the mandator.
(2) If a mandatary is to receive remuneration, the mandatary may not claim this until after having performed the mandated business;provided, however, that if the remuneration is specified with reference to period, the provisions of Article 624, paragraph (2) apply mutatis mutandis.
(3) In the following cases, the mandatary may demand remuneration in proportion to the performance already completed:
(i) if the mandatary is no longer able to perform the mandated business due to any grounds not attributable to the mandator; or
(ii) if the mandate is terminated during the course of performance..


Article 423
(1) An obligee may exercise the right of the obligor (hereinafter referred to as the "subrogor's right") when it is necessary to do so in order to preserve the obligee's own claim; provided, however, that this does not apply to rights which belong exclusively to and are personal to the obligor or rights which are immune from attachment.
(2) The obligee may not exercise the subrogor's right unless and until the obligee's claim becomes due;provided, however, that this does not apply to an act of preservation.
(3) The obligee may not exercise the subrogor's right if the obligee's claim is not enforceable by compulsory execution..


Article 612
(1) A lessee may not assign the lease or sublease a leased thing without obtaining the approval of the lessor.
(2) If the lessee allows any third party to make use of or take the profits of a leased thing in violation of the provisions of the preceding paragraph, the lessor may cancel the contract..


Article 533
A party to a bilateral contract may refuse to perform that party's own obligation until the other party tenders the performance of that other party's obligation (including the performance of an obligation to compensate for loss or damage in lieu of the performance of an obligation);provided, however, that this does not apply if the obligation of the other party is not yet due.
Article 546
The provisions of Article 533
apply mutatis mutandis to the preceding Article..


Article 623
An employment contract becomes effective when a first party promises to a second party that the first party will engage in work and the second party promises to pay remuneration for this.
Article 624
(1) An employee may not demand remuneration until the work the employee promised to perform has been completed.
(2) Remuneration specified with reference to a period may be claimed after the passage of that period..


Article 499 A person that has performed the obligation for the benefit of the obligor is subrogated to the claim of the obligee.
Article 500 The provisions of Article 467 apply mutatis mutandis in the case referred to in the preceding Article (unless a person with a legitimate interest in making performance is subrogated to the claim of the obligee).


Article 137
The obligor may not assert the benefit of time stipulation if:
(i) the obligor has become subject to the order commencing bankruptcy proceeding;
(ii) the obligor has lost, damaged, or diminished the security; or
(iii) the obligor fails to provide security when it has the obligation to do so..


Article 489
(1) If the obligor is liable to pay interest and expenses in addition to principal with respect to one or more obligations (if the obligor bears two or more obligations, limited to when the obligor bears these obligations requiring the same kind of payment or delivery to the same obligee), and the person that performs the obligations makes payment or delivery which is not sufficient to extinguish the obligation in its entirety must be appropriated first to expenses, and then to interest and principal, in this order.
(2) The provisions of the preceding Article apply mutatis mutandis in the case referred to in the preceding paragraph in which the person makes payment or delivery which is not sufficient to extinguish any of expenses, interest or principal in whole..


Article 415
(1) If an obligor fails to perform consistent with the purpose of the obligation or the performance of an obligation is impossible, the obligee may claim compensation for loss or damage arising from the failure;provided, however, that this does not apply if the failure to perform the obligation is due to grounds not attributable to the obligor in light of the contract or other sources of obligation and the common sense in the transaction.
(2) If the obligee is entitled to claim compensation for loss or damage pursuant to the provisions of the preceding paragraph, and any of the following cases applies, the obligee may claim compensation for loss or damage in lieu of the performance of the obligation:
(i) the performance of the obligation is impossible;
(ii) the obligor manifests the intention to refuse to perform the obligation; or
(iii) the obligation has arisen from a contract, and the contract is cancelled or the obligee acquires the right to cancel the contract on the ground of the obligor's failure to perform the obligation..


Article 406
If the subject matter of the claim is to be determined by a choice being made from among more than one performance, the right to choose belongs to the obligor..


Article 537
(1) If one of the parties promises in a contract to render a certain performance to a third party, the third party has the right to claim that performance directly from the obligor.
(2) The validity of the contract referred to in the preceding paragraph is not impaired even if a third party does not exist or a third party is not specified at the time of its formation.
(3) In the case referred to in paragraph (1), rights of the third party accrue when the third party has manifested intention of availing of the benefit of the contract under that paragraph to the obligor.
Article 538
(1) After rights of the third party have accrued pursuant to the provisions of the preceding Article, the parties may not modify or extinguish those rights.
(2) If, after rights of the third party accrue pursuant to the provisions of the preceding Article, the obligor does not perform the obligation to the third party, the other party to the contract referred to in paragraph (1) of that Article may not cancel the contract without the consent of the third party..


Article 706
If an obligor has paid money or delivered anything as performance of an obligation that has not yet fallen due, the obligor may not demand the return of the money paid or thing delivered;provided, however, that if the obligor tendered anything by mistake, the obligee must return the benefit gained as a result..


Article 536 (1) If the performance of an obligation becomes impossible due to grounds not attributable to either party, the obligee may refuse to perform counter-performance.


Article 514
(1) A novation by substitution of obligor may be effected by a contract concluded between the obligee and a person that becomes the obligor after the novation. In such a case, the novation becomes effective when the obligee notifies the obligor prior to the novation of the conclusion of the contract.
(2) The obligor after the novation by substitution of obligor does not acquire a right to reimbursement from the obligor prior to the novation..


Article 641
The party ordering work may cancel the contract at any time whilst the contractor has not completed the work by paying compensation for loss or damage..
