Cognizance of offences

No court shall take cognizance of an offence under this Act except on a complaint presented in person or sent by registered post by the attendance authority or any other person authorised in this behalf by the local authority by general or special order. Before making any complaint under section 14 of this Act against any person, the attendance authority or the person authorised by the local authority to make a complaint shall, unless such person has been previously convicted under that section, cause a warning to be given to such person.