Section 3(7) in The Tamil Nadu Urban Local Bodies permission for Erection of Digital Banners and Placards) Rules, 2011
(7)The Permission holder shall display the following details in the bottom of the digital banners or placards, in a font size of not less than 1 inch height, namely, District Collector's permission Number, period of validity, and total number of digital banners and placards for which permission has been given.
