"California employers can no longer ask job applicants about their prior salary and — if applicants ask — must give them a pay range for the job they are seeking, under a new state law that takes effect Jan. 1."
http://www.calpeculiarities.com/2017/10/12/third-times-the-c...
Land on page for a job on an aggregator board. GeoIP detects if you're in California; asks you confirm if you're interested in the salary range of the job. You click "yes", it submits the request (which requires a response by law). Response is reported back to requestor when it arrives, aggregator board has salary on record.
Second part of the law is brilliant!