Therefore, A agrees to erect, or cause to be erected upon the tract of land first described, the apartment house in accordance with the preliminary floor plans, and preliminary specifications which have been agreed upon by the parties, and are now on file in the office of the _________ Company, of the City of _________, _________ County, _________. A copy of which preliminary plans and specifications is attached to this agreement. A shall, promptly upon the execution of this contract, employ a competent and reputable architect to draw the detailed plans and specifications for such apartment building, to conform to the above-mentioned plans and specifications. When the detailed plans and specifications are completed by such architect, they are to be properly and formally approved by B, after objections and corrections not increasing the cost of the building made by B are met and made, which approval shall be not later than _________ days after delivery of the plans and specifications. A shall then contract for the erection of the apartment building in accordance with the detailed and final plans and specifications with some reputable and reliable contractor, construction to commence not later than _________ days after acceptance of the plans and specifications and to be under the general supervision of the architect employed by A. A proper bond of not less than $_____ shall be given to insure the completion of the apartment building in accordance with the detailed plans and specifications mentioned in this agreement.