(2)If any apparatus is found by him to agree with the Standard Test Apparatus within prescribed limits, the officer shall engrave such apparatus with a special number and with the date of the comparison, and shall give a certificate in respect of it in the prescribed form, certifying that on the said date the apparatus was compared with the Standard Test Apparatus and was found to agree with it within the prescribed limits, and specifying any corrections to be made in the results of tests carried out with the apparatus.
