Current bathroom waterproofing standards

We are having a bathroom reddone.
The builders are putting down two coats of waterproofing and then screed and then another coat of waterproofing. This is what I have been told is the current standard.
Is there a standard for the drying time between each application.
 Like  ⋅  Add a comment  ⋅  Pin to Ideaboard  ⋅  Share . This is the waterproofing membrane they are using and it does mention drying times on there.
Does this mean that the screed can't be laid until 24 hours after the second coat of waterproofing?

How long does the screed have to dry before putting the next layer of waterproofing on?

When the final code of waterproofing has been done does it have to dry for 24 hours before the tiling can be started?

This will be the third time the bathroom has been done due to the first two times being non-compliant.

Thanks