"Clause 25. Except where otherwise provided in the contract, all questions and disputes relating to the meaning of the specifications, design, drawings and instruction herein before mentioned as to the quality of workmanship or materials used on the work or as to any other question, claim, right, matter or things whatsoever,, in any way arising out of or relating to the contract, designs, drawings. specifications, estimates, instructions, orders of these conditions or otherwise concerning the work or the execution or failure to execute the same whether arising during the progress of the work or after the cancellation, termination, completion or abandonment thereof shall be dealt with as mentioned hereinafter: - i). If the contractor considers any work demanded of him to be outside the requirements of the contract or disputes any drawings, record or decision given in writing by the Engineer-in-charge on any matter in connection with or arising out the contract or carrying out of the work, to be unacceptable, he shall promptly, within 15 days request the Superintending Engineer in writing for written instruction decision. Thereupon Superintending Engineer shall give his written instructions or decision within a period of one month from the receptor of the contractor's letter.