10.7 of the Election Commission’s A guide for the Voters [PDF link] clearly mentions that “Photography of a voter casting vote is prohibited.” But the Election Commission’s own website carries an image of a woman casting her vote on an electronic voting machine [Link].
And if photographing a voter casting his/her vote is a punishable offence (should be under Section 128 of Representation of People Act, 1951 [PDF link]) then action should be initiated against Getty Images and their photographer covering the polling in Guwahati, Assam, for these images: [1] [2] [3].
Nice one!cool observation!!