Creates the New Child Bonding Leave Act. Provides that an employee who has gained custody of a child within the previous 4 weeks, either through birth, adoption, foster care placement, or otherwise, is entitled to 12 weeks of unpaid leave. Provides that an employer shall not require that an employee use any paid leave available to the employee for any reason instead of leave the employee is entitled to under the Act. Provides that, upon the conclusion of leave taken under the Act, an employee shall be reinstated to the employee's former position or a substantially equivalent one with no loss of benefits held or accrued prior to taking leave. Allows an employer to require an employee submit documentation to demonstrate that they are entitled to leave under the Act. Sets forth provisions concerning unlawful employer practices; Department of Labor responsibilities; and enforcement of the Act.