@Enai: As long as the block is visually above or below the given ground, it's fine. There's a practical reason for it - I'm not going to check all the maps in the editor and see if any blue boxes exist outside the area.
So in other words: If the block is visually within the limits, it's fine. If it's visually outside the limits (the blue box doesn't matter in this case either), it's unallowed.
@eriik991 You
must use both areas at least twice each.
... says:
Are we allowed to change the day time from that of the base maps?
Yes, I'll add this one to the rules as well.
... says:
Is mod allowed?
Yes, mods are allowed.