Flag of Texas

It is a common urban legend that the Texas flag is the only state flag that is allowed to fly at the same height as the U.S. flag. Allegedly, Texas has this right inherently (as a former independent nation) or because it negotiated special provisions when it joined the Union (this version has been stated as fact on a PBS website). However, the legend is false. Neither the Joint Resolution for Annexing Texas to the United States nor the Ordinance of Annexation contain any provisions regarding flags. According to the United States Flag Code, any state flag can be flown at the same height as the U.S. flag, but the U.S. flag should be on its right (the viewer's left). Consistent with the U.S. Flag Code, the Texas Flag Code specifies that the state flag should either be flown below the U.S. flag if on the same pole or at the same height as the U.S. flag if on separate poles.

Is this statement correct "can all states fly their flag at the same height as the us flag"?
yes