Originally Posted by
stratofortress
I'll just add that even if it's a state gov't fare, you'll have the state's abbreviation after the YCA or GCA in the fare basis code, so, for example, a Texas Government fare would be YCATX or GCATX. Same rules though - fully changeable, fully refundable, but for the capacity-controlled bucket (G), the G bucket has to be available, otherwise you have to pay the Y fare, which is usually only a nominal difference (maybe $100 or so).
There are many states that either do not bid on contract awards, or choose to still buy the cheapest fare available. While the *CATX/*CACO are unrestricted in terms of changes, the state of CO may choose to buy a restrictive fare as well, which would have a fee most of the time.