Rules glossary
↑ Parent rule: 702.158 Space Sculptor
702.158c Any time a permanent with space sculptor and any creatures without a sector designation are on the battlefield at the same time, each player who controls one or more of those creatures and doesn’t control a permanent with space sculptor chooses a sector designation for each of those creatures they control. Then, each other player who controls one or more of those creatures chooses a sector designation for each of those creatures they control. This is a state-based action (see rule 704.5u).
No sub-rules.