chennai high court judges, minister, mla are not paying professional tax

chennai high court judges, minister, mla are not paying professional tax. There are not exemption from professional tax as per chennai municpal act 1919 sec 138-H (a)(b)(c). professional tax not deducted from salary for the above person. i am having copy form16 for evidence . I enclosed reply from corporation of chennai regarding exemption. sources RTI