"However due to market developments, the key commitments Sky has with RSPs are unlikely to continue to have the same effect. For example the new sports pay TV product from Coliseum and the recent exemption granted by Sky to Telecom to market this product," he said.
"As a consequence, a warning letter and notice that we will continue monitoring Sky's contracts and conduct was the prudent course of action," Berry said.
"We reserve the right to draw the warning letter that has been sent to Sky, to the attention of a court in any subsequent proceedings against Sky."
The commission said it would release a report on its findings shortly.
It also said Sky's contracts with content providers were not likely to have breached the law.
"There appeared to be sufficient content of all types available outside of Sky's exlusive contracts to put together an appealing pay TV package," a statement from the commission said.
Sky TV made an announcement this morning to shareholders that it had been warned by the regulator.
John Fellet, Sky's chief executive, said he welcomed the end of the investigation and looked forward to reading the full final report.
"The investigation has been a long and detailed exercise but we're glad a robust decision making process has taken place," Fellet said.
"We will take into account anything in the report when we have had the opportunity to review it."