The North American Regional Broadcasting Agreement (NARBA, Spanish: Convenio Regional Norteamericano de Radiodifusión) refers to a series of international contracts defining technical standards for AM (medium wave) radios. These agreements also covered the allocation of frequencies among the signatories, with particular emphasis on clear and efficient channel allocations. The Interim Agreement expired on 29 March 1949 and it was difficult to agree on a replacement, in particular because of Mexican objections that gave rise to two failed conferences. A new NARBA Agreement, which was to enter into force five years after its ratification, was finally signed on November 15, 1950 in Washington, D.C. for the Bahamas, Canada, Cuba, the Dominican Republic, Jamaica and the United States.  Mexico, which had withdrawn from the conference, and Haiti, which had not participated, should have the opportunity to register. (The United States and Mexico entered into a bilateral agreement in 1957.)  This agreement formally added 540 kHz as a clear channel frequency and also provided that Cuba shared six and Jamaica two of the clear channel allocations.  Some provisions remained controversial and this version of the treaty was not ratified by the United States until early 1960. In 1980, Cuba announced for a year that it would withdraw from the NARBA Treaty.  The initial narba plan, also known as the “Treaty of Havana,” was signed on December 13, 1937 by the United States, Canada, Mexico, Cuba, the Dominican Republic, and Haiti and entered into force on March 29, 1941. This was followed by a series of modifications and adjustments, also under the name narba. The provisions of NARBA were largely replaced in 1983 by the adoption of the Regional Agreement for Medium Frequency Broadcasting Service in Region 2 (Rio Agreement), which covered the entire Western Hemisphere.
However, the current AM band allocations in North America largely reflect the standards first established by the NARBA agreements. For your ease of access, here you will find a list of a few frequently used radio communication phrases, traditionally used in public safety and in complex security environments such as industrial environments or sports stadiums. The County has agreed to three (3) different types of access agreements to allow non-county authorities to access the county`s public safety radio system. These agreements are as follows: a number of amendments would follow the original treaty, which was due to expire on 29 March 1946. .