Two indigenous Australians were driving their well used and abused old EH Holden wagon in the outback recently, when off in the distance they saw a police "booze bus".
 
Rather than trying to avoid it, the driver headed straight for it. As they pulled up, the driver wound his window down and said 'Gidday brudders! Two cold cans of Emu Export, tanks!'
 
The copper glared at him and said 'You must be drunk! Get out of the car and blow into this tube!'
 
The driver said 'Sorry boss, I can't blow in at dat fing, I gotta a letter from me doctor in Alice Springs saying dat I'm asthmatic
And I'll pass out if I blow inta dat.'
 
The cop smirked and said 'OK, in that case, we require you to give us a blood sample.'
 
'Nah, nah sorry, boss,' replied the driver. 'Can't be doin' that eifer. Got a letter from the Red Cross in Darwin sayin' that I'm a haemophiliac and I could bleed to deaf rel quick if I gave a blood sample. Nah, sorry, boss, can't do that!'
By now the copper was getting very irate so he demanded that the driver provide a urine sample for testing.
 
The driver shook his head and said
'Nah, sorry boss, can't do that eifer.'
 
The copper protested 'Surely you haven't got a letter for that as well!!!'
 
'Blood oath, mate!' says the driver,
'It's from Julia Gillard, the Prime Minister of this lovely Country of Australia . She's apologised, and it says that you whitefellas can't take the piss out of us blackfellas no more!