To view this article you need a PDF viewer such as Adobe Reader. If you can't read this PDF, you can view its text here. Go back to the PDF . dentons.com NYC Employers Beware: Salary History Inquiry Ban To Take Effect This Fall On May 4, 2017, New York City Mayor Bill de Blasio signed into law Introduction Number 1253-A, which will prohibit employers from inquiring about a prospective employee’s salary history during all stages of the hiring process. The new law takes effect on October 31, 2017.