4. Presentation of the sheets of drawings
4.1 Usable surface area of sheets
On sheets containing drawings, the surface usable must not exceed 26.2 cm x 17.0 cm. The sheets must not contain frames around the usable or used surface. The minimum margins are as follows: top: 2.5 cm; left side: 2.5 cm; right side: 1.5 cm; bottom: 1 cm.
R. 11.6(c)
PCT AG I 5.133