5.1.1.Any wheel controlled by an anti-lock device must not lock when the full force(1) is suddenly applied to its control device, on the two kinds, of road surface specified in 4.1.2 at initial speeds of up to 0,8 Vmax but not exceeding 80 km/h(2).
(1)
Full force means the maximum force prescribed in Section 2.4, Appendix 1 for the category of vehicle: a higher force may be used if required to actuate the anti-lock device.
(2)
On low adhesion surfaces (≤ 0,35) the initial speed may be reduced for safety reasons: in such cases, the K value and the initial speed must be noted in the test report.