Sec. 23.233
Directional stability and control.
(a) There may be no uncontrollable ground or water looping tendency in 90 degree cross winds, up to a wind velocity of 0.2 VS0,
ST,
Which country's regulations are you quoting?
That 0.2 Vso value looks like the reason for the ludicrously-low demonstrated cross-wind value of my club's DG-1000S:
The demonstrated crosswind velocity is 15 km/h (8 kts.) according to the airworthiness requirements.
DG FLugzeugbau hedge their bets a bit later in the manual:
Due to the towhook position being in the middle of the fuselage and the excellent effectiveness of the ailerons and rudder, the possibility of wing dropping or ground loops, even on a slowly accelerating aerotow is reduced. Take-off with strong crosswind is possible.