(A) This chapter is adopted under the authority of the Constitution and laws of the State of Texas, including particularly, but not limited to, Chapters 231, Acts of the 40th Legislature, Regular Session, 1927, as heretofore or hereafter amended, and the provisions of Tex. Loc. Gov't Code Chapter 212 as heretofore or hereafter amended. This subchapter is adopted pursuant to the provisions of the general law of the city.