If three subzones are designated for each use, then which one of the following is allowed?

Emil-Kunkin on November 3 at 05:38PM

Since R is not allowed in zone 1, d would force the following

1:
2: I I I R
3: R R

However, since r and h are never allowed to go together, this would force all three hs into 1, which would violate rule 2.