"Texas doesn't need Permission!"
Oh, yes, it does.
http://www.oyez.org/oyez/resource/case/380/
Your sited case is dated April 1869, the following may be of interest...
Texans voted on a revised state constitution in November 1869 and elected a state government. Once convened, the legislature voted to ratify the 14th and 15th amendments to the U.S. Constitution (the 13th amendment having already been fully ratified) and elected two U.S. Senators, thereby completing the requirements for reinstatement. President Grant signed the act to readmit Texas to Congressional representation on March 30, 1870, and this federal act was promulgated throughout Texas by a general order issued by General Reynolds on April 16, 1870.
TT
I wish Alaska would suceed