Under provisions of the Act, DOD is required to provide surveillance and communications equipment; support for drug interdiction operations (i.e., seizing drug shipments before they penetrate U.S. borders); intelligence information on foreign drug production and shipments; support for drug interdiction activities by the field command of all U.S. forces in South and Central America (excluding Mexico) and other such field commands; and aircraft, marine vessels and land vehicles suitable for use in drug interdiction efforts. DOD also is required to convene a conference of drug law enforcement agencies, including the Customs Service, the Coast Guard, and the Drug Enforcement Administration to determine the appropriate distribution of the assistance it offered. To meet its objectives, DOD reviewed the list of assistance it had compiled; invited 15 Federal agencies it identified as having drug law enforcement responsibilities to the conference at which some of the assistance was arranged; reviewed the conference report prepared by the National Narcotics Border Interdiction System (NNBIS), which coordinates drug law enforcement agency requests for DOD support; reviewed the memorandums of agreement with four of the agencies attending the conference; and interviewed DOD and NNBIS officials.