sane agreements and codicils to let its dead leaves
Agreements influence what happens to the leaves.
The leaves are alive but still impacted by the agreements.
A boy is sleeping.
A little boy is sleeping in bed
The man is sleeping on his moped.
Despite Hannigan's mood, I'm able to interpret that he was referring to a show or something particular to Las Vegas.
The Base Estimate may underestimate the proposal's benefits but the Alternative Estimate won't.
That woman is sitting silently.