Referees to 1 April
Referees are appointed to many top matches again this weekend, including the Heineken Cup which gets going again and is at the crucial knock-out stage.
Then there are also the Hong Kong Sevens for men and women with referees of both genders.
The FIRA-AER Under-18 European Championship starts in France this coming weekend.
Czech rugby is back from hibernation.
International
Eruropean Nations Cup
Division 2B
Croatia vs Latvia in Makarska
Referee: Toma? Breburda (Czech Republic)
Division 3A
Switzerland vs Denmark in Basle
Referee: Serge Goffinet (Belgium)
Under-19
Ulster Academy vs Russia
Referee: David Wilkinson
Schools
Ireland vs Japan Under-19
Referee: Alan Rogan
Touch judges: Dudley Phillips, M Gargan
Under-18 European Championship
The championship starts on 31 March.
Group A
England vs Portugal in Bayonne
Referee: Radu Petrescu (Romania)
France vs Romania in Mont-de-Marsan
Referee: Mark Hermin (Ireland)
Italy vs Russia in Saint-Paul les Dax
Referee: Eric Soulan (France)
Ireland vs Georgia in Hossegor
Referee: Geraint Roberts (England)
Group B
Spain vs Latvia in Hendaye
Referee: Marcin Zeszutek (Poland)
Belgium vs Holland in Ondres
Referee: Alessandro Cason (Italy)
Germany vs Czech Republic in Mouguerre
Referee: Vyatcheslav Ivanov (Russia)
Poland vs Ukraine in Tartas
Referee: Laurent Scafler (France)
Group C
Switzerland vs Israel in Tartas
Referee: Richard Donavan (Denmark)
Lithuania vs Austria in Ondres
Referee: Jeremy Brown (Switzerland)
Denmark vs Sweden in Mouguerre
Referee: Mathieu Raynal (France)
Croatia vs Hungry in Hendaye
Referee: Jose Manuel Pardal (Spain)
Group D
Moldavia vs Serbia in Ustaritz
Referee: Christophe Degos (France)
Bosnia vs Bulgaria in Ustaritz
Referee: Pascal Gauzere (France)
Sevens
Men's referees: Julian Pritchard (Australia), Matt Stanish (New Zealand), James Jones (Wales), Phil Smith (Canada), Taizo Hirabayashi (Japan), Eva Mafi (Tonga)
Women's referees: Rachel Boyland (Independent), Liu Hao (Independent), Clare Shryane (Arabian Gulf), Joyce Henry (Canada), Shi Yong Jin (Tim) (China), Andrew Tranent (Hong Kong), Miho Osawa (Japan), Anastassiya Khamova (Kazakhstan), Carmel Seeto (Singapore), Chris Draper (USA)
Heineken Cup Quarter-finals
Llanelli Scarlets vs Munster
Referee: Chris White (England)
Touch judges: Tony Spreadbury (England), Peter Huckle (England)
Television match official: Graham Hughes (England)
Assessor: Gianni Romano (Italy)
London Wasps vs Leinster
Referee: Joel Jutge (France)
Touch judges: Franck Maciello (France), Jean-Luc Rebollal (France)
Television match official: Gerald Borreani (France)
Assessor: Jim Fleming (Scotland)
Biarritz vs Northampton Saints
Referee: Nigel Owens (Wales)
Touch judges: Hugh Watkins (Wales), Huw Griffiths (Wales)
Television match official: Derek Bevan (Wales)
Assessor: Paul Bridgman
Leicester Tigers vs Stade Francais
Referee: Alan Lewis (Ireland)
Touch judges: Alain Rolland (Ireland), Olan Trevor (Ireland)
Television match official: David McHugh (Ireland)
Assessor: Brian Leigh (England)
European Challenge Cup
Clermont Auvergne vs Newcastle Falcons
Referee: Malcolm Changleng (Scotland)
Touch judges: Peter Allen (Scotland), Jim Yuille (Scotland)
Assessor: Bertie Smith (Ireland)
Bath vs Bristol
Referee: Donal Courtney (Ireland)
Touch judges: George Clancy (Ireland), Peter Fitzgibbon (Ireland)
Assessor: Joel Dume (France)
Television match official: Brian Abrahams (England), Marshall Kilgore (Ireland)
Dragons vs Brive
Referee: Wayne Barnes (England)
Touch judges: Dave Pearson (England), Paul Dix (England)
Assessor: Douglas Kerr (Scotland)
Television match official: Laurie Bryant (England), Graham Highes (England)
Saracens vs Glasgow Warriors
Referee: Christophe Berdos (France)
Touch judges: Eric Gauzins (France), Jean-Michel Schutz (France)
Assessor: Brain Campsall (England)
Television match official: Bob Ockenden (England)
Super 14
Week 9
Highlanders vs Cheetahs in Invercargill
Referee: Stuart Dickinson (Australia)
Touch judges: Geoff Acton (Australia), Brent Murray (New Zealand)
Television match official: Gary Wise (New Zealand)
Assessor: Alan Riley (New Zealand), Keith Hendricks (South Africa)
Force vs Sharks in Perth
Referee: Lyndon Bray (New Zealand)
Touch judges: Kelvin Deaker (New Zealand), Dan Cheever (Australia)
Television match official: George Ayoub (Australia)
Assessor: Ian Scotney (Australia), Lusanda Menze (South Africa)
Hurricanes vs Bulls in Wellington
Referee: Brett Bowden (Australia)
Touch judges: James Leckie (Australia), Gary Wise (New Zealand)
Television match official: Brent Murray (New Zealand)
Assessor: Stuart Beissel (New Zealand), Dennis Immelman (South Africa)
Chiefs vs Blues in Hamilton
Referee: Steve Walsh (New Zealand)
Touch judges: Chris Pollock (New Zealand), Jonathon White (New Zealand)
Television match official: Ben Skeen (New Zealand)
Assessor: Kim Eichmann (New Zealand)
Waratahs vs Crusaders in Sydney
Referee: Craig Joubert (South Africa)
Touch judges: Deon van Blommestein, George Ayoub (Australia)
Television match official: Bradley Wahl (Australia)
Assessor: Ian Scotney (Australia), Paul Ramsay (New Zealand)
Lions vs Brumbies in Johannesburg
Referee: Paul Honiss (New Zealand)
Touch judges: Bryce Lawrence (New Zealand), JC Fortuin
Television match official: Johann Meuwesen (South Africa)
Assessor: Arrie Schoonwinkel (South Africa), Sandy MacNeill (Australia)
Czech Republic
Czech KB Extraliga - 10th round
Ricany vs Sparta
Referee: Erik Bossan
Touch judges: Vaclav Herman, Milan Haitman
Slavia vs Vy?kov
Referee: Jiri ?tuksa
Touch judges: Roman Vitek, Radka Waitova
Havirov vs Dragon
Referee: ?tepan Cekal
Touch judges: Roman Kr?ak, Josef Vyoral
Petrovice vs Tatra
Referee: Toma? Tuma
Touch judges: Jiri Livers, Emanuel Borovian
Argentina
Campeonato Argentino
Final Zona Campeonato
Tucuman vs Buenos Aires
Referee: Victor Rabuffetti (Entrerriana)
Touch judges: Martin Rodriguez (Santafesina), Andres Ramos (Cuyo)
Zona Permanencia
Salta vs San Juan
Referee: Pablo Deluca (Buenos Aires)
England
National league 1
Coventry vs Leeds Tykes
Referee: Tim Beddow
Touch judges: Alan Biggs, Dave Grashoff
Exeter Chiefs vs Doncaster
Referee: Gareth Copsey
Touch judges: Greg Garner, Lloyd Jackson
Assessor: Bob Bullock
London Welsh vs Cornish Pirates
Referee: JP Doyle
Touch judges: Steve Leyshon, Nick Clarke
Assessor: A Richardson, N Weaver
Newbury vs Waterloo
Referee: Adrian Hartwell
Touch judges: Ed Turnill, Paul Burton
Assessor: Clive Nicholas
Coach: Clive Leeke
Pertemps Bees vs Otley
Referee: Rowan Kitt
Touch judges: Keith Lewis, Steve Savage
Assessor: Chris Harrison
Plymouth Albion vs Moseley
Referee: Richard Draper
Touch judges: Eric Woodmason, Kevin Obern
Earth Titans vs Bedford Blues
Referee: Brian Robertson
Touch judges: Dale Newitt, Martin Buck
Nottingham vs Sedgley Park
Referee: Terry Hall
Touch judges: Dave Edmunds, Peter Facey
Assessor: Bob Wilkinson, Tony Rossall
France
Pro D2
Gaillac vs Bordeaux-Begles
Referee: Christophe Dutreuilh
Touch judges: Jean-Yves Quintin, Rene Bordeneuve
Assessor: Bernard Perez
Beziers vs Grenoble
Referee: Rene Roustany
Touch judges: Bernard Vals, Didier Gibert
Assessor: Daniel Pruvot
Toulon vs Racing Metro 92
Referee: Vincent Azoulay
Touch judges: Frederic Gourgues, Guy Pince
Assessor: Michel Messan
Tarbes vs Lyon
Referee: Bernard Dal Maso
Touch judges: Patrick Dellac, Didier Barnagaud
Assessor: Roger Duhau
Limoges vs Auch
Referee: Franck Maciello
Touch judges: Maurice Duny, Didier Morin
Assessor: Marc Desclaux
Colomiers vs Pau
Referee: Philippe Bonhoure
Touch judges: Jean-Louis Suau, Jean-Claude Dastugue
Assessor: Marc Daroque
Dax vs La Rochelle
Referee: Jean-Luc Rebollal
Touch judges: Jean-Claude Abejean, Fernand Pereira
Assessor: Robert Antonin
Oyonnax vs Mont-de-Marsan
Referee: Cedric Marchat
Touch judges: Jean-Paul Vermande, Jean-Luc Gonzalez
Assessor: Serge Marzullo
Ireland
AIB Cup
Belfast Harlequins vs Shannon
Referee: David Keane
Touch judges: Alan Rogan, Kevin Beggs
Garryowen vs Clonakilty
Referee: Simon McDowell
Touch judges: Eanna O'Dowd, David Wilkinson
Italy
Super 10 - XIII Giornata
Infinito L'Aquila v Arix Viadana
Referee: Maurizio Vancini (Milano)
Touch judges: Gianluca Bonacci (Roma), Pio Di Santo (Milano)
Rolly Gran Parma v Carrera Petrarca Padova
Referee: Mauro Dordolo (Udine)
Touch judges: Claudio Castagnoli (Livorno), Beniamino Zanette (Venezia)
Femi Cz Rovigo v Amatori Catania
Referee: Carlo Damasco (Napoli)
Touch judges: Nereo Dordolo (Udine), Francesco Lento (Udine)
Almaviva Ur Capitolina v Overmach Cariparma
Referee: Stefano Marrama (Padova)
Touch judges: Claudio Passacantando (L'Aquila), Antonello Fracasso (Padova)
Benetton Treviso v Cammi Calvisano
Referee: Giulio De Santis (Roma)
Touch judges: Stefano Penne (Milano), Roberto Orlandini (Roma)
Serie A - XVIII Giornata
Girone A
Med Italia Pro Recco v Mantovani Pol. Lazio 1927
Referee: Diego Bono (Brescia)
Zhermack Badia v Promopack Rugby Brescia
Referee: Andrea Belvedere (Roma)
Franklin&Marshall Cus Verona v Consiag I Cavalieri Prato
Referee: Patrizio Baldo (Rovigo)
Mag Data Colorno v Hafro Design Udine
Referee: Giovanni Farese (Napoli)
Casino' Di Venezia v Exagerate Careca Reggio Emilia
Referee: Danele Pacini (Livorno)
Trest Orienta Asr Frascati v Novaco Rugby Alghero
Referee: Salvatore Quirino (Napoli)
Girone B
Antares Benevento v Partenope Rugby
Referee: Giovanni Cenci (Colleferro)
Modena Rugby v Termoraggi Cariparma E Piacenza
Referee: Massimo Brescacin (Treviso)
Admo Leonessa Brescia v Sg Rugby Segni
Referee: Stefano Traversi (Rovigo)
Orved San Dona' v Giunti Cus Firenze
Referee: Emiliano Laube (Milano)
Banca Farnese Lyons Piacenza v Ludom Avezzano
Referee: Andrea Pasquin (Rovigo)
Marchiol San Marco v Futura Park Rugby Roma
Referee: Stefano Roscini (Milano)
Scotland
Scottish Cup Final
Watsonians vs Boroughmuir
Referee: Andy Ireland
Touch judges: Alan "Trees" Forrest, John Ferns
South Africa
Vodacom Cup
Blue Bulls vs Leopards
Referee: Linston Manuels (SARU)
Touch judges: Mandla Dakuse (Border), Johan Greeff (Blue Bulls)
Television match official: Michael Cupido (Golden Lions)
Coach: Theuns Naude (Coach)
Assessor: James Apollis
Border vs Boland at ABSA Stadium, East London
Referee: Christie du Preez (SARU)
Touch judges: Roderick Barry (Western Province), Jonathan Mouers (Eastern Province)
Assessor: Jacques Hugo
Griffons vs Lions at North West Stadium, Welkom
Referee: Stuart Berry (KwaZulu Natal)
Touch judges: Fakumile Yamile (Eastern Province), Cobus Wessels (Blue Bulls)
Television match official: Michael Cupido (Golden Lions)
Griquas vs Pumas at Posmasburg
Referee: Gareth Lloyd-Jones (SARU)
Touch judges: George Roper (Blue Bulls), tbc
Assessor: Gerrit Coetzer (Free State)
Western Province vs South Western Districts at Newlands
Touch judges: Jonathan Kaplan (SARU)
Touch judges: Peet Badenhorst (Golden Lions), Silulami Pityoi (Western Province)
EP vs Wildebeest at EPRU Stadium
Referee: Willie Roos (SARU)
Touch judges: Louis Mzomba (Western Province), Mlungiseli Mdashe (Eastern Province)
Assessor: Jacques Hugo
Spain
Division de Honor - 13? jornada
Cetransa UEMC vs El Salvadorv Barcelona
Referee: Paloma Loza (Madrid)
Complutense Cisneros vs Getxo Artea
Referee: Joan Aloy (Girona)
Kitmar Ordizia vs CIC Rugby Valladolid
Referee: Manuel Chicharro (Sevilla)
Liceo Frances vs Spyro Bera Bera
Referee: Felix Villegas (Valladolid)
UE Santboiana vs Madrid Noroeste
Referee: Sabin Cortabarria (Vizcaya)
Division de Honor B - 12? jornada
Grupo 1
Universidade de Vigo vs Tecnidex Valencia
Referee: Fernando Raposo (Valladolid)
Jeep Alcobendas vs Durango Ilarduya
Referee: Rafael Ortega (Sevilla)
Gernika vs Cornella
Referee: tba
Hernani vs Oviedo
Referee: Jose Real (Valencia)
Grupo 2
Universidad de Malaga vs Les Abelles
Referee: Igotz Gallastegi (Guipuzcoa)
Atletico Portuense vs Arenalsa Mairena
Referee: Jose Bogas (Barcelona)
El Monte Ciencias Vs Universidad De Granada
Referee: Jose Juega (Madrid)
CAU Valencia vs Ucam Murcia
Referee: Alberto Perez Iglesias (Asturias)
Wales
Premiership
Llandovery vs Swansea
Referee: Phil Fear
Touch judges: Wayne Davies, Alwyn Harries
Bridgend vs Bedwas
Referee: Howard Hopkins
Touch judges: Phil Harrhy, Gareth Widlake
Glamorgan Wanderers vs Ebbw Vale
Referee: Neil Ballard
Touch judges: Steve Edwards, Leighton James
Aberavon vs Cross Keys
Referee: Huw David
Touch judges: Neil Perkins, Andrew Bevan
Cardiff vs Neath
Referee: Nigel Whitehouse
Touch judges: Reg Hughes, Phil Evans
Maesteg vs Pontypridd
Referee: Tim Hayes
Touch judges: Mike Cox, Robert Mota