Interoffice Memorandum: Processing of Initial Parole or Renewal Parole Requests Presented by Natives or Citizens of Cuba to USCIS Field Offices [open pdf - 549KB]
"This memorandum provides U.S. Citizenship and Immigration Services (USCIS) Field Offices guidance on processing of initial parole or renewal parole requests presented by natives or citizens of Cuba, and also processing of applications for employment authorization submitted in connection with such parole requests."
U.S. Citizenship and Immigration Services: http://www.uscis.gov/