Originally Posted by
Panzon
It clearly reads "and". There's no way to read it as "and/or". So you've gotta have both >=150 HP and STOL wingtips. Your wiggle room may come in how STOL wingtips are defined.
Insuficient information has been provided, and the original poster has refused to address questions. It's impossible to say, given the partial information provided, what the exact effectivity is.