Postopek je prikazan na sliki 3 v tej prilogi. Referenčna ravnina je trdna, gladka, ravna površina, na kateri stoji vozilo in na katere površini sta trdno pritrjeni dve milimetrski merilni skali, pri čemer skala x-x ne sme biti krajša od 8 m, skala y-y pa ne manj od 4 m. Skali morata biti postavljeni pravokotno druga na drugo, kakor je prikazano na sliki 3 te priloge.
The method of achieving this is set out in figure 3 of this Annex, the reference plane being a hard, flat, level surface on which the vehicle stands, and which has two measuring scales firmly fixed to its surface; these shall be graduated in millimetres, the X-X scale being not less than 8 m long, and the Y-Y scale not less than 4 m long. The two scales must be set at right angles to each other as shown in figure 3 of this Annex.