At RAH:

Standard reserve blocks are at 12 hours and paid at 4 hours (if called) or block/or better whichever is higher. We can be used up to 16 hours at the start of our reserve period, but required to work no more than 14 hours. Call out, must call back within 20 min, and total time from call to show is 1 hr 30 mins

Hot Reserve (which we don't use but is in the contract) 5 hours of pay in 10 hour blocks, same 5 hours min, block/or better whichever is higher. Max utilization from the start of hot reserve is 14 hours. Per Diem is paid for hot.