On November 10, 2009 Philadelphia's Mayor Nutter signed an executive order about immigration status, as part of the Philly Counts press conference to promote participation in the 2010 Census.

The executive order prohibits city employees from asking about immigration
status, unless specifically required by law, or to determine program eligibility.  It also
makes immigration status confidential - unless required by law, with the permission of the
individual, or if the individual is suspected of criminal activity.   

Regulations for law enforcement officers are as follows:

-prohibited from stopping, questioning, arresting, or detaining someone solely because of ethnicity,
national origin, or perceived immigration status. 
-may not ask about immigration status unless the status is directly related to a crime for
which the person is being investigated or relevant to the identification of a
suspect.
-may not ask about immigration status for the purpose of enforcing
immigration laws.
-specifically prohibited from asking about the
immigration status of victims, witnesses or others who call or approach the
police seeking help.

The City has translated the Executive order into Chinese, French, Khmer, Korean, Russian, Spanish, and Vietnamese

File Attachment: 

EO 8-09 - Access of Immigrants to City Services.pdf