I have read the threads for this credit as well as any LI that I could find to determine the amount of testing locations required. There is however a conflict of information as follows - a thread on LEED User states that the number is 10% of the first 100 units and then 5% thereafter, however I have found an LI #5028 which notes that it is to be 1 out of every 7 units to be tested.

Which is correct?