Historical Rules · 7 June 2024
Rule 704.5u
Official source text from the 7 June 2024 Rules release
If a permanent with space sculptor and any creatures without a sector designation are on the battlefield, 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. See rule 702.158, “Space Sculptor.”