Comments made by Mr Tucker at an event in Washington DC last month have been released, with the official suggesting financial institutions are becoming more adept at bending the rules.
He claimed regulatory arbitrage - the process by which banks take advantage of loopholes such as price differences between two markets - is now "absolutely endemic" in the global finance industry, the Telegraph reports.
Mr Tucker said some organisations are already working out ways to "arb" the forthcoming Basel III requirements.
"This is part of freedom; it's part of capitalism. But it means that the official community needs to be rather more nimble and savvy," he commented.
The official described the Basel Committee on Banking Supervision's review of capital requirements for trading book positions as one of the most important developments for 2011.
In September, the global body agreed to formulate new rules that will more than double capital requirements for banks.
By Tony Aynsley