The meaning of the term "SATA not pwr gate"

More information regarding SATA power gating and what does power gating means.

Summary
 
Under Modem Standby Checklist Tab of Document Number 610002 entitled Modem Standby Unified Checklist (Rev. 1 Part 2), what does the phrase "SATA not pwr gate" mentioned in Row 52 means?
 
Platform Contoller Hub (PCH-IP) Serial Advanced Technology Attachment (SATA) controller needs SATA link state to be Slumber or deeper (DevSLP or OFF) to be power gated. While SATA link state is in Active or Partial, PCH-IP SATA would be not power gated.
 
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The meaning of the term "SATA not pwr gate"