The WARC bands are 3 HF frequency ranges used by licensed Amateur radio operators. They consist of 30 meters (10.100-10.150 MHz), 17 meters (18.068-18.168 MHz) and 12 meters (24.890-24.990 MHz). They were named after the World Administrative Radio Conference which in 1979 created a world wide allocation of these bands for amateur use. The bands were opened for use in the early 1980s. Due to their relatively small bandwidth of 100 kHz or less, there is a sort of Gentlemen's agreement that the WARC bands may not be used for general Contesting.
Band Charts are for general information, please check your local band plan for operating privlages.
For example; ARRL Band Plan
or RSGB Band Plan.