[OCCRA]: Height of the VEX Rim

On page two of the 2009 OCCRA rules manual, GR5 states:

Each of the basketball structures on the VEX field has a rim that is 22” above the floor, plus or minus one inch.

However, later, on page six, VGR3 says:

Each of the basketball structures on the VEX field has a rim that is 28” above the floor, plus or minus one inch.

Which height of the rim is correct?

Official Answer:

We measured it several times and the 27.5 measurement on average around the rim at different locations is correct. That is why we raised the height of the bot to 22 inches (from 18).