"Vendors" and "Purchase Orders" as used inthis Article shall be deemed to include purchases only to the extentthat such purchases involve special design or development for thigssiibcontract. ARTICLE 3.-- CHANGES The Contractor may at any time, by a wrig¢fen order, and without notice to the sureties, make changes, within. the genkral scope of this Subcontract, in the definition of services to be perfortpd, and the time (i.e., hours of the day, days of the weeks, etc.) and place of performance thereof. If any such change causes an increase or decrease in the cost of, or the time required for, the performance of any part of the work under this Subcontract, whether changed Or not changed by any such order, an equitable adjustment shall be made in the Subcontract price or delivery schedule, or both, and the Subcontract shall be modified in writing accotdingly. Any claim by the Subcontractor for: adjustment under this Article must be asserted within 30 days from the date of receipt by the Subcontractor of the notification of change, PROVIDED, however, that the Contractor, if he decides that the facts justify such action, may receive and act upon any such claim asserted at any time prior to final payment under this Subcontract. Where the cost of property made obsolete or excess as a result of, a.change is included in the Subcontractor's claim for adjustment, the Contractor shall have the right to prescribe the manner of disposition of such property. Failure to agree to any adjustment Shall be a dispute concerning a question of fact witain the meaning of the ‘Article of this Subcontract entitled "Disputes." However, nothing in this Article shall excuse the Subcontractor from proceeding with the Subcontract as changed. ARTICLE 4 — CONDITIONS AFFECTING THE WORK The Subcontractor shall be responsible Ke having taken steps reasonably necessary to ascertain the nature andc}cation of the work, and the general and local conditions which can affect the work or the cost thereof. Any failure by the Subcontractor to do so will not relieve it from responsibility for successfully performing the work without 4Jditional expense ‘The Contractor assumes no respoos ib 111 to the Contractor. ‘or any understanding or representa~ tions coricerning conditions wade by aQYvof its officers or agents prior to the execution of this Subcontract, unless such understanding or representations by the Contractor are expressly stated in the Subcontract. ARTICLE 5 — INSPECTION OF SERVICES a. All services (which term throughout thig Article includes services performed, material furnished or utils sd in the performance of services, and workmanship in the pe G¥ymance of services) shall be subject to inspection and test by the Contractor, to the extent prac- ticable at all times and places during the term of the Subcontract. ALL imspectians by the Contractor shall be made in such a manner as not to unduly delay the work. b. AY If any services performed hereunder’ mot in conformity with the requirements of this Subcontract Qehe Contractor shall have 9008653 the right