Sorry I did Did not find in the pdf ( 2 D ) nor in the header of army list , nor searching in the forum . Let's take the example I could not solve . An army has an allowance of 4-8 Cv in UGs 4,6 . And 0-1 internal Ally.

Q1 : Main army takes all 8 Cv in two UGs of 4 each . Does Internal ally HAVE TO take one of the groups or is it allowed that he takes none as maximum is already allocated to main army ?

Q2 : Same question main army takes one UG of 6 ... 2 is not enough left for an UG to the Ally  ( that part is clear to me  , ally does not get any ). To me this implies that if main army takes large enough part there is not enough to make a valid UG for ally , then ally gets nothing.

To me , In both cases, not enough left is not enough left : 2 is not enough for a cav UG , zero is not enough either . 

Q3 : Differently stated : what level of authority does the C-C have ? May he take all the cav , leaving no allowance for his Allie's ?

🧙‍♂️🐯🐲🎋

I think the example in the list PDF's answers this.

Quote
They must take enough UGs to get them to at least 50% of the minimums in the list if there is enough allowance for a UG after the core army itself has taken the minimum. For example: An army has 4-12 cavalry (UG size 4,6) and 18-32 spearmen (UG size 6,8,9) as compulsory troops with 2 internal allies. The core army must take 4 cavalry and at least 18 spearmen. The first ally must take 4 cavalry and at least 9 spearmen. The second ally must take 4 cavalry but cannot take the 9 spearmen as this would exceed the 32 spearmen limit for the army.

My emphasis added.

The core army takes the minimum required and then the internal ally takes its requirement.

So in your 4-8 cavalry example the core army takes 4 bases as this is the minimum and then an internal ally takes the other 4. It is not allowed for the core army to take all 8 bases and leave none for the ally.

The procedure to meet (what I think is) the intended requirement is:

1. Give the main army the minimum.

2. First ally:
2a. Give the ally half the minimum.
2b. If this is less than the minimum UG size, give him more to get to the minimum UG size.
2c. If either of those takes you over the army maximum, the ally does not need to take any at all of this troop type.

3. Second ally:
(same procedure as first ally)

4. Third ally:
(same procedure as first ally)

5. Once all the allies have been done, any remaining bases can go to any command (main, or ally).

6. Allies do not have to be in the same order for each troop type.

Not sure if there are any cases where half the minimum is more than 1 UG, but if so, in that case I think you would have to round up to a whole number of UGs at 2b.

roughly speaking, the main army has to take the minimum, allies have to take half the minimum, but if there are not enough bases for everyone to meet their own minimum (using whole UGs), then the main army takes priority.

Thanks