Federal HR policy (as in those working for Federal entities) states 22 days for everybody under a certain level of management. I don't have it handy but I expect the minimum days for pilots and cabin crew are specified in the CARs. I will have a look later unless someone beats me to it.
Edit. Could not see min days in CARs for pilots and CC but did not look very hard. ATC is specified however.
Last edited by Plazbot; 6th Nov 2014 at 12:12.