These are the reserve month bidding/award rules.
The first number is the minimum number of consecutive on-call days for a reserve block. Prevents you from being on-call for only 1 or 2 days, at least from the initial bid.
The second number is the max number of consecutive on-call days, so having it at 99 makes it irrelevant.
The last number is the maximum number of X day blocks (X day is a day off) in a bid period. So your off days can’t be split into more than 4 or 5 groups depending on that number.