[santosh]

I think recogniition of other strong contendors would be very good. Like the honorable mention of the teams who din't win national chairman's.
The idea that a 3peat shouldn't be allowed kinda make me think of it as this way, the Bulls won 3 basketball championships in a row (twice), therefore they shouldn't be allowed ot compete anymore. Or the Patriots created a Football dynasty with the 3 wins of 4 years, therefore they shouldn't be able to compete for it.
The Judges pick who they believe deserves the award. To me the award is an added bonus to the satisfaction you already recieve from inspiring kids to study in and pursue careers in science. I believe that a team should be able to win the chairman's award as many times in a row as they can. It is an award, It is given to the best. You just can't give that up to another team who probably did a superb job in their attempt to win the award but wasn't the best, because that wouldn't be fair at all for the team that was the best.
But I do concur with aaronD341. the work shouldn't be done with the intent to win the CA award.