Supreme Court deprecated the practice of using the photographs of politicians on Government Advertisements.
(1) publication of photographs of the Government functionaries and political leaders along with the advertisement(s).
(2) appointment of an Ombudsman
(3) the recommendation with regard to performance audit by each Ministry.
(4) embargo on advertisements on the eve of the elections.
Common Cause Vs Union of India on 13 May 2015
Citations: [2015 ABR 4 219], [2015 SCC 7 1], [2015 SCC ONLINE SC 479], [2015 KERLT 2 739], [2015 KLT 2 739]
Other Sources:
https://indiankanoon.org/doc/177370809/
https://www.casemine.com/judgement/in/5790b298e561097e45a4e2fd
State Governments filed Review Petition and got SC to allow them (Central Ministers in lieu of Prime Minister, State Ministers in lieu of Chief Minister) to feature in Advertisements here.