You're right with regard to the canted hulls - there is nothing that says they're not allowed. However, the rule was changed with regard to the daggerboards specifying that they must remain in the vertical plane of the hulls.
B.1.4. DAGGERBOARDS AND RUDDERS The platform shall be equipped with a pair of rudders and, if fitted, a pair of daggerboard or centerboards. The dagger board boxes and the rudders have to be in the vertical plan of the hulls. The daggerboard or centerboards and rudders may be made using epoxy resin. Carbon may be used for the construction of daggerboard, centerboards or rudder blades. All underwater appendages must be symmetrical.
