Through multimodal interaction principles, one avoids the overgeneration that would result from global Associativity and/or Commutativity options for a single composition operation ⊗. Undisciplined use of multimodality, however, could easily lead to the introduction of construction-specific mode distinctions, thus compromising one of the main attractions of the typelogical approach.  The theory of structural control operators to be discussed below offers a more principled solution to the type of problem multimodal approaches address.