26. (1) Notwithstanding anything to the contrary contained in any other law for the time being in force, no one, other than a registered medical practitioner or a registered dentist, shall be competent to hold any medical or dental appointment in a medical or dental college or its attached hospitals or as a Commissioned Medical or Dental Officer in any Hospital, asylum, infirmary, dispensary or lying in-hospital, maintained or aided by the Government, Railway or any local authority. (2) Notwithstanding anything to the contrary contained in any other law for the time being in force, no certificate required by any such law to be obtained from a medical or dental practitioner shall be valid unless it is signed by a registered medical practitioner or a registered dentist, as the case may be.