"Directed," "required," "permitted," "ordered," "designated," "selected," "prescribed" or words of like import used in the specifications or in the contract documents to mean respectively the direction, requirement, permission, order, designation, selection or prescription of the Construction Administrator, and similarly the words "approved," "acceptable," "satisfactory," "equal," "necessary" or words of like import to mean respectively, approved by, or acceptable or satisfactory to, or equal, or necessary in the opinion of the Construction Administrator.