The Media Development Authority (MDA) forced SingTel to share its English Premier League (EPL) broadcasts because the telco had made it "commercially unviable" for rival StarHub to purchase the rights.
This was revealed for the first time in a document that the MDA put up on its website to explain its decision.
The regulator said that there were two clauses in SingTel's deal with the Premier League which had the "combined effect" of making it exclusive, triggering the cross-carriage rule.
One clause meant that StarHub would not be allowed to announce the purchase of the EPL television rights or promote the matches before a prescribed time. SingTel was also to be told when its rival was set to begin marketing activities with regards to the EPL.
MDA found that this had "a negative impact on consumer knowledge and choice". For instance, StarHub could have lost prospective customers to SingTel between the time that it captured the rights to the EPL and when it was allowed to publicise this.
The other clause said SingTel was entitled to "a significant price reduction" of the fees it paid for the EPL rights. While the rebate size was not revealed, MDA noted this would probably lead to the Premier League asking StarHub for a similar sum for the rights.
That cut the chances of a deal, especially if StarHub did not value the rights so highly.
After SingTel announced last December that it had secured the next three EPL seasons in what was supposedly a "non-exclusive" deal, StarHub complained it was unable to start negotiations for its own rights until March.
In April, MDA ordered SingTel to make available its EPL content on StarHub's pay-TV platform.