Memorandum: Adjudication of Form I-751, Petition to Remove Conditions on Residence where the CPR has a Final Order of Removal, is in Removal Proceedings, or has Filed an Unexcused Untimely Petition or Multiple Petitions [open pdf - 78KB]
"This memorandum provides detailed guidance to USCIS [U.S. Citizenship and Immigration Services] Immigration Services Officers (ISOs) on the adjudication of I-751 petitions filed by a conditional permanent resident (CPR) who is the subject of a final order of removal, is in removal proceedings, has filed untimely, or has filed multiple petitions."
HQ 70/6.1.8 : HQ 70/6.1.1: AD09-48
U.S. Citizenship and Immigration Services: http://www.uscis.gov/