Normally, the CLUT chunk will appear after the BMHD of an FORM ILBM before
the BODY chunk, in the same "section" as CMAPs are normally found.
However, a FORM may contain only CLUTs with no other supporting
information.

As a general guideline, it is desirable to group all CLUTs together in a
form without other chunk types between them. If you were using CLUTs to
store RGB intensity corrections, you would write three CLUTs in a row, R,
G, then B.

Here is a box diagram for a 320x200x8 image stored as an IFF ILBM with a
single CLUT chunk for intensity mapping:

        +-----------------------------------+
        |'FORM'         64284               |     FORM 64284 ILBM
        +-----------------------------------+
        |'ILBM'                             |
        +-----------------------------------+
        | +-------------------------------+ |
        | | 'BMHD'      20                | |     .BMHD 20
        | | 320, 200, 0, 0, 8, 0, 0, ...  | |
        | | ------------------------------+ |
        | | 'CLUT'      264               | |     .CLUT 264
        | | 0, 0, 0; 32, 0, 0; 64,0,0; .. | |
        | +-------------------------------+ |
        | +-------------------------------+ |
        | |'BODY'               64000     | |     .BODY 64000
        | |0, 0, 0, ...                   | |
        | +-------------------------------+ |
        +-----------------------------------+