I kind of figured that he probably didn’t read the handbook himself, otherwise he would know that rest times here aren’t negotiable.*

I’m in a pickle about what to do, or if this should even be brought up? I don’t want to bring it up because I feel I would then be inviting their input in this aspect of our daycare routine. & rest times here are non negotiable. I have a feeling my comment suggested that this was a regular possibility. I don’t have the space or supervision available to accommodate children who don’t join in our rest time.
When you say NON NEGOTIABLE. That means ENFORCED? (perhaps that needs to be changed and worded differently)

Children do not come up with a book of instructions, we try to guide and help them by suiting their needs a handbook can be used to follow regulations but, personally I do not think it should be used to "enforce" in a child a natural development. Even if it is a "very soothing" space. When children give up their naps that space won't stop that, their brain grows and need more activity or stimulation.

I'm sure, this subject will come up in my weekly playdates meeting (many parents read our posts) hopefully it is just my misunderstanding :0)