Yes, years back alot of the major clubs followed the RCACN rules for IR combat or atleast a tweaked version to suit the clubs needs. For the most part they were good guidelines just got to be a little too
"historical" with regards to tank inspections. People were waiting in line to get their turret speed, elevation/depression, tank speed, emitter depth, etc instead of being on the field playing. Most of the tamiya kits
out of the box would not pass these inspections so you'd have a operator that just spent $800 on a tank, drove 6 hrs, spent $120 on a hotel room for the weekend and was then told he couldn't put his tank on the field. This was partly addressed with a first time "exemption" but then you had people grumbling that they had spent time and money on their tanks to comply and now have to battle KT's that are racing through the battlefield or Pershings with wicked quick turrets even though most of them had to get the "exemption" as well on their first visit. Rules/guidelins are a very touchy thing when dealing with peoples spare time and money in a hobby. They need to be able to adapt to changes in technology, the battlefield your on, and the demographic of the operators.