Historical Rules · 14 April 2023
Rule 702.158b
Official source text from the 14 April 2023 Rules release
A sector designation is a designation a permanent can have. The sector designations are alpha sector, beta sector, and gamma sector. Only permanents can have a sector designation. Once a permanent gets a sector designation, it keeps it until no player controls a permanent with space sculptor or an ability whose source has space sculptor. A sector designation is not part of the permanent’s copiable values.