restricted keyway authoriztion letter

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Letter of Authorization (LOA) allows restricted product to be purchased.   Restricted product sample LOA.   Bitting list sample LOA.
The 40-100 is a multiple tailpiece pack with a pre-assembled, 0-bitted, key-in-knob cylinder.  The kit includes the following: (1) Pre-assembled cylinder 0-bitted, less tailpiece 40-100 (...
The pack is available in all keyways, Everest and Classic families including restricted keyways except Primus. 
Schlage Everest B keyways are restricted SFIC keyways.
A PO from a distributor with a letter of authorization from the end user.