Apart from Icasa, Sentech is a key role-player in the digital migration process, whilst Broadband Infraco is a state-owned telecommunications company.
This document was also created by Mack, according to MultiChoice.
Perhaps the most shocking aspect of Muthambi's communications with Chawla came in the form of a document called "final proclamation 01 August", sent by the minister to the Gupta associate on the date mentioned in the document's title.
"See attached Proclamation that President must sign," Muthambi wrote Chawla, who subsequently forwarded it to Tony Gupta.
The proposed proclamation stipulated that control over section 3 of the Electronic Communications Act needed to be transferred back to Muthambi, exactly as Mack had originally pleaded in her letter.
It also included the proposed changes to the Icasa Act that Muthambi had earlier sent to Chawla.
Asked whether Mack had also created this document, MultiChoice said: "As mentioned previously, MultiChoice, like other companies in the sector, regularly engages the industry regulator and government on matters that affect the broadcasting sector. This includes making proposals that may take a specific regulatory or legislative form.
"Yes, this document was sent to Ms Muthambi. The proposals were inserted in a legislative template we took from previous Proclamations in the Government Gazette. Again, many of our proposals were rejected."
Muthambi uses her powers
On November 25 Zuma signed proclamation 79 of 2014. With the stroke of a pen, Zuma gave legislative effect to the transfer of some of the powers advocated for in Mack's documents.
Muthambi wasted little time to make use of her newly-won policy powers. In March 2015, she stunned the broadcasting industry by issuing an amendment to government's digital migration policy that went directly against her own party's stance on the matter.