This page is an entry in the Key.

negative film

Inverting the colors to convert a negative image to a positive is one of the many “light”-related changes allowed on TCQ photographs.

(This action was a staple of “respected international news agencies” for decades and if done in a straightforward manner is not considered doctoring.)

The inversion of colors required for this process is often cited on this website as an example of how there is no limit on how much tones and colors can be changed in order for a photograph to meet rinairs and Q7.