http://www.qrpcc.de/contestrules/oqrpr.html ...

https://www.arifano.it/contest_marconi.html ...

http://www.drcg.de/dldxrtty/dl-dx-rtty-english.html ...

https://concursos.ure.es/atlantico-v-uhf/bases/ ...

https://www.rac.ca/wp-content/uploads/2023/04/Canada-Day-Contest-Rules-2023-english.pdf ...

https://www.iaru-r1.org/2023/iaru-hst-world-championship-2023/ ...

Elettra Back On Air! - ninth edition – June 10 and 11th, 2023 Ham Radio Activation of “Elettra“ yacht relic SPECIAL MARCONIAN STATION CALLSIGN I Y 4 F G M Villa Griffone (Marconi's birthplace) - Ponte ...

https://concursos.ure.es/s-m-el-rey-de-espana-ssb/bases/ ...

https://www.jarl.org/English/4_Library/A-4-3_Contests/2023AA_rule.htm ...

https://www.iaru-r1.org/wp-content/uploads/2021/03/Rules-2021.pdf https://www.iaru-r1.org/wp-content/uploads/2021/03/Rules-2021.pdf ...