Increased or Decreased Quantities. The right is reserved at any time during which the contract is in force, to make such alterations in the plans on the quantities of work as may be necessary including the extension or shortening of the length of the project. Such alterations shall, in so for as practical, be ordered in writing before standing work on such alterations, and no sign drawings shall be taken as in itself as order for variation unless accompanied by a covering letter from the Superintending Engineer confirming that the drawings is an authority for variation further, the quantities of any items of work may vary from the quantities in Schedule 'A' due to unforeseen or other conditions. Alterations in quantities shall not be considered as a waiver of any conditions of the contractor invalidate any of the provisions thereof. A supplemental Agreement with the contractor for the items or . items involved will be r1ecessary when the alterations involved the following: An increase or decrease only up to 25% shall be permitted in the quantity of any item due to variation from the factors used in original design or in the preparation of tender within the originally contemplated scope of work or due to addition or reduction from or changes in design of such contract item. Adjustment of compensation satisfactory to both parties shall have been executed. Supplemental Agreements for minor items, which have been increased to become major items, will be required for shall cover only the quantity having contract value, determined from the contract unit price, in excess of 6% percent of the total original contract cost. (A major contract items shall be construed to be any Item the total cost of which equal 10 or greater than 5 percent of the total contract cost.) The contractor shall not start work on any alterations requiring a supplemental agreement untill the agreement setting forth an equitable adjustment of compensation, satisfactory to both the parties, shall have been executed. The contractor shall perform the work as increased or decreased.
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