This distress signal was first adopted by the MISC@1 government in radio regulations effective April NUMBER@1 , NUMBER@2 , and became the worldwide standard under the second MISC@2 , which was signed on November NUMBER@3 , NUMBER@4 and became effective on July NUMBER@1 , NUMBER@5 .

It was introduced by the MISC@1 government in radio regulations on April NUMBER@1 , NUMBER@2 . It became the worldwide standard when it was included in the second MISC@2 , which was signed on November NUMBER@3 , NUMBER@4 . This convention developed many MISC@3 to be added to the main agreement , which was signed on November NUMBER@3 , NUMBER@4 , and became effective on July NUMBER@1 , NUMBER@5 .
