Border Security First Act of 2006

Border Security First Act of 2006 - Sets forth border security and enforcement provisions, including provisions respecting: (1) personnel and asset increases and enhancements; (2) a National Strategy for Border Security; (3) improving Mexico's southern border security; (4) border security initiatives, including biometric data enhancements and a biometric entry-exit system, document integrity, and mandatory detention of aliens apprehended at or between ports of entry; and (5) National Guard deployment on the U.S. southern border.

Border Tunnel Prevention Act - Provides criminal penalties for construction, financing, or use of illegal border tunnels or passages.

Provides for: (1) the emergency deployment of additional Border Patrol agents; and (2) an increase in full-time agents.

Border Law Enforcement Relief Act of 2006 - Authorizes a border relief grant program for a tribal, state, or local law enforcement agency in a county: (1) no more than 100 miles from a U.S. border with Canada or Mexico; or (2) more than 100 miles from any such border but which is a high impact area.

Sets forth law enforcement provisions respecting: (1) reimbursement for state costs in processing illegal aliens; (2) expedited removal of criminal aliens; (3) increased federal detention space for aliens; (4) the Northern Border Prosecution Initiative; and (5) reimbursement of Southern Border State and county prosecutors for prosecuting federally initiated drug cases.

Affirms state law enforcement authority to assist (including transfer to federal custody) the federal government in enforcing U.S. immigration laws during the normal course of law enforcement duties. Provides for related federal reimbursement of state costs.

Border Infrastructure and Technology Modernization Act - Provides for: (1) a port of entry infrastructure assessment study; (2) a national land border security plan; (3) expansion of the Customs-Trade Partnership Against Terrorism programs along the northern and southern borders; and (4) a port of entry technology demonstration program.

Provides for the implementation of programs to: (1) fully integrate and utilize aerial surveillance technologies, including unmanned aerial vehicles (UAVs); (2) procure additional automated surveillance assets to achieve operational control of U.S. borders; and (3) achieve border security on certain federal land along the borders.