It is a bit more than that Robert ! For England (RFU juristiction) my understanding is as follows :
'Clinical Governance' as RFU now calls it, is a club responsibility NOT the referee's.
RFU defines
First Aid care, and have
RFU First Aid Kit Guidelines and a
RFU First Aid course
We as referees have responsibilty for player safety and under our duty of care should check :
1) provision of stretcher / blankets
2) first aid kit
3) access - gates not padlocked (it has happened)
4) doctor or trained medical, first aid, and physios present
5 Hampshire's rural clubs have been asked to register postcode and directions with Hampshire Ambulance Service after a near death last season, when the ambulance couldn't find the ground in middle of countryside !
6) easy access to phone and contact number for emergency services clearly shown (or mobile on touchline with reliable individual
All clubs should have a good first aid kit and a first aider available on match days. Many clubs will have a physio present to. But I don't think it is mandatory ! At tournaments (especially for Youth) Clubs should have St Johns or similar paramedic service on site witrh ambulance fully equipped with CPR etc.
The whole issue of medical cover has changed in the last few years, and quite frankly becomea bit stupid. Most doctors and trained medical staff will now NOT get involved as they cannot get appropriate medical third party liability insurance cover at affordable premiums. However in life threatening situations they would of course get involved.
Gone are the days when you could be stitched up on the side of the pitch - as I was by the opposition scrum half when playing for the Old Boys v Guys Hospital (he was an ex-sChool and University pal !)
Club and Referee insurance is now handled centrally. A new funding scheme for all clubs at levels 5 and below was approved by the RFU Council at its 28 April 2006 meeting. This decision means that from season 2006/07 onwards, the RFU conditional funding scheme for clubs has been terminated and, in its place, the RFU centrally funds all player accident insurance, together with clubs' public liability and employer liability policies.
see RFU handbook for more regulations :
Rugby Injuries - Reporting, surveillance, support and pastoral care at
http://www.rfu.com/microsites/handbooks/index.cfm?fuseaction=handbook.detail&storyid=8139