The HDR in PNG spec has wording specifying a priority of iCCP < iCCN < cICP.
It mentions when cICP is not present and iCCN is, the iCCP chunk should be ignored.
But the wording for the cICP chunk only says the iCCN chunk should be ignored. It doesn't mention the iCCP chunk.
The cICP should explicitly mention the iCCP chunk should be ignored to be as clear as possible.
The HDR in PNG spec has wording specifying a priority of iCCP < iCCN < cICP.
It mentions when cICP is not present and iCCN is, the iCCP chunk should be ignored. But the wording for the cICP chunk only says the iCCN chunk should be ignored. It doesn't mention the iCCP chunk.
The cICP should explicitly mention the iCCP chunk should be ignored to be as clear as possible.