IN GENERAL.
24. Changes in drawings, sketches or order lists issued to the shop shall only be made when authorized by the chief engineer, or, in his absence, by the chief draughtsman, and when so authorized shall be made by the order clerk.
25. The names of all similar parts in order lists and drawings are to be uniform.
26. Tracings must be kept in safe, for blue-printing purposes only. Office copies of blue-prints must be used for references.
27. No drawing, print or photograph shall be taken from office without permission.