US Code - Chapter 18: Military support for civilian law enforcement agencies

Section 371 Use of information collected during military operations
Section 372 Use of military equipment and facilities
Section 373 Training and advising civilian law enforcement officials
Section 374 Maintenance and operation of equipment
Section 375 Restriction on direct participation by military personnel
Section 376 Support not to affect adversely military preparedness
Section 377 Reimbursement
Section 378 Nonpreemption of other law
Section 379 Assignment of Coast Guard personnel to naval vessels for law enforcement purposes
Section 380 Enhancement of cooperation with civilian law enforcement officials
Section 381 Procurement by State and local governments of law enforcement equipment suitable for counter-drug activities through the Department of Defense
Section 382 Emergency situations involving chemical or biological weapons of mass destruction

Arming of american vessels

Organization and general military powers

Humanitarian and other assistance