The Wage Theft Prevention Act (WTPA) took effect on April 9, 2011. The law requires employers to give written notice of wage rates to each new hire.We enforce the State Labor Laws for minimum wage, hours of work, employment of minors, payment of wages, farm labor, nursing mothers in the workplace, and more. This pamphlet does not address all applicable employment laws or all employment situations, and is not meant to provide legal advice. Governor Cuomo is expected to sign both of the bills. Ban on Salary History Inquiries. A. Effective Date. A.1. When does the Maryland Wage Range Transparency law take effect?