So not really sure which way this goes, but...
Page 20 of TR3145 The Clans lists the Hadur's armor as
"Compound VM22 Ferro-Fibrous"
However, the state block on page 21 doesn't list it as FF armor and the armor layout (22/20/20/16/18) = 96 points is correct for 6 tons of Standard Armor(6x16 = 96). It is however, ALSO correct for 5 tons of Clan FF Armor (16x5x1.2).
The record sheet in the back of the book doesn't show what kind of armor it is. The record sheet in RS3145u doesn't show what kind of armor it is.
Normally I'd just say the fluff is wrong and go with Standard armor, since the design works better with standard armor (it would be 1 ton underweight with FF armor, but still "technically" legal).
However, TR3150 restates the "Compound VM22 Ferro-Fibrous" armor for its description (though again, the statblock shows standard armor), AND under variants, states "The Hadur currently has two alternate configurations. The first replaces standard ferro-fibrous armor with reactive armor..."
So which way does it go? Which book needs errata? Is it going to be left a ton underweight, or will the armor be adjusted for 6 tons of Clan FF armor? Or will it stay with standard armor, and all instances of FF armor needs to be removed?