Phrasal Toneme Deletion (in reduplication)
tonal spread
[H|LH .+] [H|LH .+] > [H|LH.+] .+ / (RDP_)(noun|adjective_)
When a noun or adjective carrying a LH or H toneme is reduplicated, the second repetition loses its toneme.
Tida’s wording suggest that application of this rule is optional.