subcontractor shall prepare and furnish to contractor the documents including but not limited to specifications, calculations, drawings, procedures and reports as required by the agreement for its approval. subcontractor shall not proceed with any part of the work covered by or related to such documents until approval from contractor is received. such approval shall not be unreasonably withheld, however, if contractor is received, such approval shall not be unreasonably withheld, however, if contractor disapproves the document, contractor shall so notify subcontractor stating the reasons for disapproval and subcontractor may either modify the document or re- submit it within five (5) working days for contractor approval pursuant to the provisions of this article.