While I may not follow the recommendations to a tee, the following is my interpretation of the similarities between the three sources on the subject of file types.
The purpose of an Archive Master image is to preserve the original recording. All subsequent images are derived from the Archive Master. The image processing and file format of derivatives is determined by their intended use.
A Production Master image is a rendition of the Archive Master. The Production Master is intended to show the image when reproduced in ideal form. Image processing may be applied to Production Masters.
It is common practice to save a compressed version of the Production Master to serve as an access Derivative. Derivative images are usually saved as 8-bit Jpegs. For ease of reproduction, Derivatives may be stored as sRGB images.