Relating to required agreements between county sheriffs and the United States to enforce federal immigration law.

HB 2257 requires Texas county sheriffs to apply for and maintain participation in federal immigration enforcement programs under Section 287(g) of the Immigration and Nationality Act. Specifically, it mandates sheriffs to seek agreements allowing local law enforcement to either process removable noncitizens detained in county jails ("jail enforcement model") or serve federal immigration warrants ("warrant service officer model"). The bill prohibits sheriffs from ending existing agreements with federal authorities and requires annual reapplication attempts if initially denied. This directly affects all Texas county sheriffs, imposing a legal obligation to engage with federal immigration enforcement mechanisms.