Everest D sections/keyways are restricted.

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It is not possible to key SFIC and standard cylinders including Schlage FSIC into the same system.  A keyway name may be shared between the two key fami...
A PO from a distributor with a letter of authorization from the end user.
Schlage Everest B keyways are restricted SFIC keyways.
Split key systems are delivered in the highest level section on the key tip (insert): L - obverse or classic Y - reverse 0000 - Paracentric ZZZZ - Quad D000 - restricted Everest C000 - open...
All of the Everest D sections/keyways are restricted.