By Byron KayeSYDNEY, July 29 (Reuters) - Elon Musk's X accused Australia of trying to give its internet regulator unfair information-gathering powers and undermining U.S. law with plans for tougher enforcement ‌of a teen social media ban. Australia's world-first law barring accounts for under-16s took effect last ‌December, drawing criticism from social media companies, mostly based in the United States. The plans did not give "due regard to procedural fairness, privacy, the broader impacts on online services, and Australia's digital economy", X told an Australian senate committee. The ‌billionaire Musk himself called the Australian social media ban a "backdoor way to control access to the internet by all Australians" in an earlier post on X. Data published by eSafety and studies since the ban have shown most Australian teenagers under 16 still have social media accounts.