Melbourne City were prevented from signing Frank Lampard after Football Federation Australia decided loan payments must now be included within the salary cap.
John van 't Schip's team were heavily tipped to recruit the veteran midfielder for at least part of the 2014-15 campaign ahead of his arrival at sister club New York City.
However, the former Chelsea man will instead spend the first half of the new season with Premier League champions Manchester City before embarking on his Major League Soccer adventure.
"The issue of loan arrangements has been reviewed by FFA because of the increasing usage of loan players last season and the structure of loan deals between Australian and foreign clubs," FFA said in a statement published the Herald Sun.
"We now have two A-League clubs in football group ownership (Melbourne City with City Group and Brisbane Roar with Bakrie Group), so that's another factor in FFA taking a look at loan deals.
"Starting from season 10, FFA will apply a principle that any amount that is paid by the A-League club that goes to the player - either directly or indirectly by way of a payment to his overseas parent club - is counted under the salary cap.
"This will ensure that the integrity of the salary cap is protected and we will continue to have the principle of competitive balance at the core of the A-League.
"In the case of group ownership, where players may move between affiliated clubs without a normal loan fee, FFA has measures to ensure that a fair and reasonable salary is attributed to the salary cap for those players."
Although they were thwarted in their pursuit of Lampard, Melbourne City have secured the services of David Villa for a guest stint in 2014-15, while Robert Koren has arrived as the new international marquee player.