Candidates should bear in mind that the economic immigration programs that have been in place in recent years remain in place under the Express Entry selection system. Once an Invitation to Apply (ITA) for permanent residence has been issued to a candidate, he or she must submit a range of supporting document with his or her application, as was the case previously. These documents include those pertaining to civil status such as marriage certificates (if applicable), birth certificates, language test results, an Educational Credential Assessment (ECA; if applicable), work reference letters, security background checks, and other documents.