Immigration officials say they will consider San Francisco's request to pull out of a program that automatically sends them the fingerprints of arrested foreigners.
ICE rejected previous requests.
The sheriff sent a new letter Wednesday, and this time, ICE agreed to meet with the agencies involved to consider the option.
A document posted on ICE's website on Aug. 17 lays out a process by which a jurisdiction may opt out of the program before it is implemented.
Legal groups and immigrant advocates point to it as evidence that the program is voluntary.