[Sacajaweau]

Residency...I agree there may be something there. There may also be an "absent" clause perhaps likened to "resignation or death".

[Blood of Tyrants]

There is a portion of the Texas Constitution that states that if a legislator is no longer a resident of the district to which he was elected, then his seat shall be declared vacant.

The pubs don't have the cojones to do this, though. Hell It took almost three weeks for them to simply levy a fine.