no
non-revers on positive space (generally employees who are traveling for a business purpose) are ALWAYS behind revenue standbys. There would be no circumstance under which a non - rev positive space traveler should get an upgrade before a revenue employee.
non rev space available (generally those traveling for "fun" or commuting for work) are behind non rev positive space travelers for upgrades. They are at the bottom of the list after all positive space and revenue travelers are accommodated.