Section 509 of IPC 1860: Word, gesture or act intended to insult the modesty of a woman
Word, gesture or act intended to insult the modesty of a woman-Indian Penal Code
Whoever, intending to insult the modesty of any woman, utters any word, makes any sound or gesture, or exhibits any object, intending that such word or sound shall be heard, or that such gesture or object shall be seen, by such woman, or intrudes upon the privacy of such woman, shall be punished with simple imprisonment for a term which may extend to three years, and also with fine.