Clarification of NMU policy

[Peter Eisentraut <peter_e@gmx.net>]

I have been in a discussion with a fellow developer about the exact 
meaning of the "0-day NMU policy" that is currently in effect.  
Questions:

1. Does the 0-day policy only apply to RC bugs or to all bugs?

2. Does the "0 day" apply to the delay after the upload or to the delay 
between the submission of the bug and the upload?

3. Does any rule, policy, or BSP excuse people from following the NMU 
protocol in the developer's reference, for example, the requirement to 
submit a bug before the upload?

Thank you for clarifying.

(Please Cc me.)