SYDNEY, Australia (AP) -- Aging Hollywood hunk Sylvester Stallone faces stiff fines after trying to bring vials of a muscle-building hormone into Australia, where it is restricted. Lawyers for Stallone, the 60-year-old star of the "Rocky" and "Rambo" movie franchises, represented him in a Sydney court on Tuesday where he faces one charge of importing a banned substance. Stallone and his entourage were stopped at Sydney airport and kept for several hours on February 16 as he arrived for a promotional visit, while customs officials searched bags and confiscated items. His hotel room was searched and more items confiscated three days later. (Full story) Stallone and his group were allowed to leave Australia, and he was not compelled to appear in the Sydney Local Court for Tuesday's hearing. Human Growth Hormone is officially considered a performance-enhancing drug in Australia, and it cannot be imported without a permit from the Therapeutic Goods Administration. The maximum penalty for bringing it into Australia illegally is a fine of $11,000 Aust (US$8,644) and five years in prison. Stallone is unlikely to face the maximum penalty. The case was adjourned until April 24, when Stallone's lawyers will be asked to enter a plea on his behalf.