When the CD standard was devised, a series of books describing the capabilities of each format were written, RED book is the defacto music standard, and it includes the PQ code that most CD players needed to grep the disc, ORANGE book was the data standard, it didn't need PQ code and was designed for CD-rom, there are others, RAINBOW, YELLOW and WHITE are all different multimedia standards.
The trouble used to be that audio tracks burnt to CD-rom wouldn't play back on domestic players, but most new machines will play them now. To be certain, burn via Jam at SINGLE speed (it makes an audible difference) for RED book audio CD's.
Toast audio CD's are ORANGE book, but will probably work OK.
To allow direct mastering of the glass masters for CD reproduction, RED book CD's are required, otherwise the plant will have to rip the audio, introduce the PQ code and then go to glass.