Mariachi other music into their repertoires, including waltzes and polkas. It also required them to play in public venues. From the late 19th century to the 1930s, Mariachi groups were semi-professional. In the early 20th century, U.S., record companies began actively recording rural music in other parts of the world. One of these as a recording called Cuarteto Coculense by Columbia, Edison and Victor in 1908 and 1909, recognized as the “first” mariachi recordings. The music also gained attention in Mexico City when a wealthy hacienda family brought an early Mariachi from Cocula to play for President Porfirio Díaz in 1905.
WARC bands codified in official recommendations, such as the IARU Region 1 HF Manager's Handbook, which states: Contest activity shall not take place on the 10, 18 and 24 MHz bands. Non-contesting radio amateurs are recommended to use the contest-free HF bands (30, 17 and 12m) during the largest international contests. (DV05_C4_Rev_07) Canada is part of region 2 and as such is subject to the IARU band plan. Radio Amateurs of Canada offers the bandplan below as a recommendation for use by radio amateurs in that country but it does not have the force of law and should only be considered a