When the deadline for a specific app cycle is in the past (whether on the global level or the overriding program level), applicants are no longer allowed to create an application for that app cycle. However, even though the deadline has passed, an administrative user with access to Application Finder (Admin Console) or Applicants > New Application (Classic) can still create an application for a user in that app cycle.
Note: It is important to remember that the existing application deadline will still be in effect and the new application will need to have an extension provided. Providing a date in the 'Waive Until' box will allow the applicant to access the application and complete any requirements in the pre-decision phase of the process:
Another option for accepting late applications would be to re-open the program (and only that program) for any applications until the new deadline has passed.