Ahead of his speech to a joint session of Congress Tuesday night, a senior administration official has said that President Donald Trump would be open to an immigration “compromise” that would allow illegal immigrants who are not serous or violent criminals to work, pay taxes and reside in the country.

Such a bill would have to be drafted by and passed by both houses of Congress.

Any such bill would likely require illegal, or undocumented, immigrants to go through a ¬†bureaucratic process to establish their “bonafides” or claim to remain in the country. There could also be many ways a person could become ineligible for relief.

The details of relief would be provided in the actual bill, followed by Department of Homeland Security regulations implementing new procedures, said New York administrative lawyer Eric Dixon. “In those respects, a compromise bill may not reflect a significant departure from existing immigration laws and regulations,” explained Dixon. “Any compromise may offer “relief” by establishing a new commitment by the Trump Administration to process and decide on the status of the millions of illegals in this country.”