Text in force at CS25-28: from CS25-27, effective 7 Dec 2021.
(a) The following applies:
(1) A 90° cross component of wind velocity, demonstrated to be safe for take-off and landing, must be established for dry runways and must be at least 37 km/h (20 kt) or 0·2 VSR0, whichever is greater, except that it need not exceed 46 km/h (25 kt).
(2) The crosswind component for takeoff established without ice accretions is valid in icing conditions.
(3) The landing crosswind component must be established for:
(i) Non-icing conditions, and
(ii) Icing conditions with the most critical of the landing ice accretion(s) defined in appendix C and O, as applicable, in accordance with CS 25.21(g).
ED Decision 2021/015/R · Source