Manana brought the government and the party into disrepute when he admitted to slapping Mandisa Duma during an altercation at Cubana in Fourways, Johannesburg.
Yet the commission's former chairperson and party stalwart Andrew Mlangeni said before action could be taken against Manana the commission had to find out whether the allegations of assault were true or not.
Manana eventually fell on his sword and resigned both as deputy minister and MP, and no action was taken against him.
He is not the only one. Earlier this year, it emerged that the integrity commission had also last year asked former president Jacob Zuma to step down amid myriad allegations he faced. Zuma reportedly refused to heed the commissions' advice.
So it was not surprising to hear new chair George Mashamba admit that two senior party members in Limpopo implicated in the VBS scandal - Danny Msiza and Florence Radzilani - had snubbed him and the commission. Instead, Mashamba deferred the decision to the ANC national executive committee on the matter. He can't be faulted as his powers are limited.
If the ANC took its integrity commission seriously, it would have not effectively postponed a constitutional amendment on its powers in last year's conference to the next national general council in mid-2020.
The amendment would have given the commission sharp teeth to bite those who drag the party through the mud.