Due to the often lengthy period involved in processing AOS applications, USCIS allows applications for EAD/AP to be made concurrently with an application for AOS which grant the ability to work in the US (Employment Authorisation Document) and travel outside the US (Advance Parole) before a decision has been on the underlying AOS application. The grant of EAD/AP is usually (but not always) made by USCIS before the AOS application is approved and the two applications (EAD/AP) are commonly combined into a single card called a "Combo Card" which the applicant receives following approval.