Due to the portability provisions of Public Law 106-313 (Title I), Section 105, it is possible to "transfer" or "port" H1B status to another employer based on the timely filing of a petition for new employment by that sponsoring employer. This is commonly referred to as "portability." Once the employer has received the receipt notice from USCIS certifying the timely filing of the petition to sponsor the employee for H-1B status, the employee may commence working for the new employer. The employee does not have to wait for the I-797 approval notice to begin working for the new employer.