DUI in Mexico

What is the penalty for DUI in Mexico?  I don't have any official information, but this is my understanding.  First, for commercial drivers (taxi, bus, etc), there is zero tolerance.  I don't know the penalty, but they will probably lose their license and be fired.  Second, for most of the natives in Mexico, the penalty for a DUI is a $20 fine/bribe paid to the police and overnight in jail if they are too drunk.  Third, for American tourists, if they are too drunk to drive, the policia will take you to jail and let you out the next day with a fine of $40 to $100.  If they are not too drunk, the fine/bribe will be $20 to the police.  Fourth, some resort cities have their own laws which are "stricter".  In Cabo San Lucas, the police have portable breathalyzers.  If the driver is in the range of 0.08 to 0.19, the fine is $125 with no loss of license.  In the range is 0.20 to 0.39, the fine is $250 also no loss of license.  It is only when the BAC is over 0.40 that the penalty becomes more "serious".  Then the fine will be $500.  And you can still get your license back, once you sober up.  Source.