Killer Shark,
Apologies for my previous facetious remarks .. I now note from your profile that you have a certification familiarity and/or background .. in which case I suspect that your original post was either a boring day diversion ... or a bit of a wind up ...
I have to take the view that you are being a bit pedantically engineer-ish. For the average line pilot, the distinctions between derate certification and operational reduced thrust takeoff tend to be a bit moot.
However your link to the FAA AC library ought to be noted by the guys and girls ... while the library fills up a lot of bookshelf space .. they do make for interesting and useful reading ...
[ 05 February 2002: Message edited by: john_tullamarine ]</p>