Click Here & Upgrade PDF Complete Expanded Features Unlimited Pages Documents 13. All documents shall be so presented as to permit of direct reproduction by photography, reprography or electronic means, as the case may be, in an unlimited number of copies. Where paper forms are used, all sheets shall be free of cracks, creases and folds. Only one side of a sheet shall be used, except where otherwise specified. 14. All documents which are not photocopies of other documents shall be on A4 paper which shall be strong, pliable, smooth, matt and durable or in such electronic form as authorized by the registrar for electronic services. Each sheet shall be used with its short sides at the top and bottom (except where inappropriate in the case of drawings). 15. Except for drawings, the minimum margins (which shall be kept completely blank) shall be as follows: Top: 20 mm. Left side: 25 mm. Right side: 15mm Bottom: 10 mm 16. In all original typed documents the typing shall be 11/2 line spacing or double spacing. The capital letters used shall be not less than 2,1 mm high. All documents except drawings shall be in typescript or printed and shall be in dark, durable colour. 17. Units of weight and measures shall be expressed in terms of the metric system. If a different system is used, such units shall also be expressed in terms of the metric system. Temperatures shall be expressed in degrees Celsius. If a different system is used, such temperatures shall also be expressed in degrees Celsius. For the other physical values, the units recognised in international practice shall be used. For mathematical formulae the symbols in general use, and for chemical formulae the symbols, atomic weights and molecular formulae in general use, shall be employed. In general, use should be made of technical terms, signs and symbols generally accepted in the field in question. 18. If a formula or symbol is used in the specification a copy of such formula or symbol, prepared in the same manner as drawings, shall be filed if the registrar so directs. 19. All documents, including drawings, shall be reasonably free from erasures and from alterations, overwritings and interlineations and shall, in any event, be legible. 20. D rawings Drawings accompanying an application shall be on sheets of A4 size and the minimum margins shall be the same as those set out in regulation 15, except that below the top margin there shall be a space clear of any drawing matter to leave space for the name of the applicant, the application number and the numbering of the sheets and that at the bottom righthand corner there shall be a space within the margin and not occupied by drawing matter for the signature of the applicant or his agent. All references signs appearing on the drawing shall be simple and clear. 21. Drawings shall be on strong, pliable, smooth, matt and durable drawing paper or on strong, pliable, smooth, matt and durable tracing cloth or in such electronic form as authorized by the registrar for electronic services and shall be executed without colouring in durable, black, sufficiently dense and dark, uniformly thick and well defined lines and strokes to permit of satisfactory reproduction. 22. Application for the grant of patents (1) An application for a patent shall be made on Form P1 and shall be accompanied by the following documents: (a) Form P1, in duplicate, one copy of which shall be returned to the applicant as proof of lodging;