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With the kind of government you ask for, it essentially isn't open source.
One of the first working custom ROMs available for the Sony Ericsson X10 mini was made by a 16 year old. He was something of a cunt, and eventually abandoned it, but his work wasn't bad at all. And even if a ROM is abandoned, it's not like switching to another one is much different from upgrading. The problem is if you get highly developed forks under closed licenses, with no source available.