46 CFR § 153.1126 - Discharge of NLS residue from a slop tank to the sea: Categories A, B, C, and D.
NLS residue in a slop tank may not be discharged into the sea unless -
(b) For Category B NLS residue transferred to the slop tank under § 153.1119(b), the NLS is discharged -
(1) Through an NLS residue discharge system with the flow recording equipment required in § 153.481(b)(2) operating; and
(2) At a rate maintained at or below Q in the following:
For tank contents that are miscible
For tank contents that are immiscible