Well, in the past we've had ILS, MLS and RNAV.approaches. In LVP we could have both MLS and ILS approaches being conducted, and thus apply different sensitive areas depending on which landing aid the arriving aircraft was using.
While MLS has been withdrawn which has simplified things, I believe that even in CAT I ops the tower should always know what type of approach arriving aircraft are condusting in case of navaid failure, or critical area infringement by aircraft/vehicles.