Railroad Commission of Texas v…
“ The occasion for keeping such matters where the Legislature may deal with them as changing conditions may require forbids that they be regarded as part of the charter contract unless a purpose to make them such be plainly disclosed. In short, the fact that a particular provision is found in the statutes of the state relating to railroads, or even in a special act incorporating a railroad company, does not in itself suffice to show that the provision is a part of the charter contract. ”
