(1) When a prime contractor has been supplied, etc. with the subject matter, etc. from a subcontractor, he or she shall not return them to the subcontractor, unless any reason attributable to the subcontractor exists (hereinafter referred to as "unreasonable return"); provided, where the supply of labor among entrustment with service is entrusted, the same shall not apply.
(2) Any act of the prime contractor which falls under any of the following subparagraphs shall be deemed unreasonable return:
1. Returning the subject matter, etc. by reason of cancellation of order from the other party to the transaction, or any change in economic circumstances, etc.;
2. Returning the subject matter, etc. by vaguely determining the criteria and method of inspection, and thereby judging unjustly that the subject matter, etc. failed to pass inspection;
3. Returning the subject matter, etc. although they have been judged to have failed to pass inspection due to the inferior quality of the raw materials supplied by the prime contractor;
4. Returning the subject matter, etc. by reason of delay in the supply, although it is caused by delay in the supply of raw materials by the prime contractor.[This Article Wholly Amended on Apr. 1, 2009]