General - Two interp you can give to a level that you exchanged. One is that you've exchanged/sent a price table, and the label is an index into the table. In scope for PAP09 and EI. The other is information for load shedding. Then DLC is another thing.

EdK deps on DLC - send a dispatch of 100MW is that a DLC sig? If say no? levels are a char of that info. Is it a lot or is it a little. Gives some qualitative char – WTC - levels and the level. EdK set at 4 levels. Also a mech if someone wanted to def disrete levels of any bounded size could do that as well. CAISO uses 10