Extensive delays based on the fact that ATC assume we have the fuel when there is no requirement to do so. Tempo weather does not mean we will have 60 minutes fuel to burn on traffic delays if the forecast is above SAM. RPT fuel policies use SAM where available. ATC yesterday assumed we use alternate weather minima. There is a big difference in minimum weather criteria. The discussion is based around the applicable alternate weather criteria and how ATC use it for their own traffic purposes. A Tempo visibility of say 3000m and base of 800' for Syd or Bne does not require 60 minutes hold fuel since the weather is above SAM but ATC think we must have it! The SAM for the above is 750'/2500m close I know but not equal or below and therefore 60 mins fuel not required. I can't make it any more specific.