[SOLVED] Does APNG support frame-based palettes or only a global palette?

Does APNG support frame-based palettes or only a global palette?

I'm having a hard time understanding how palette information is handled in APNG animations that use type PNG_COLOR_TYPE_PALETTE because, apparently, there is little to no documentation.

All PNG_COLOR_TYPE_PALETTE test animation files that I have have just a single PLTE chunk; i.e., all frames share the same global palette. Is this a limitation of the APNG file format; or, can frames also use individual palettes as is possible with GIF, for example? If that is possible, where should the frame-based PLTE chunks go?

Thanks!

Solution

To validate your answer:

"[The frame data chunk] utilizes the same bit depth, color type, compression method, filter method, interlace method, and palette (if any) as the default image." [https://wiki.mozilla.org/APNG_Specification#.60fdAT.60:_The_Frame_Data_Chunk]