Furfarksake!.... have to remember this for an exam...my bad, Bloggs. Read the whole section before picking on the individual para...in plain english..if after an enroute check you find you do not have enough fuel to reach your destination...after you planned to get there in the first place...and the BoM lets you down with a dud wind forecast or somebody crunches on the runway, making it u/s or an act of bloody god then find another runway that you can get to ...with enough reserves.