Michael,

In Alaska, Part 135 operators can
get the max gross raised by up to 15%, depending on the airplane.

Do you have a reference for this?

I've chased it a couple of times but can't find it (I'm assuming I'm
looking in the wrong places); all I've found is for an increase for a
few very old Dept of Commerce or CAA certified airplanes such as
Stinson Trimotors and so forth, nothing modern. If you've got a
reference, I'd appreciate it.

All the best,
Rick