It shall be a defence for a relevant data user charged with an offence under subsection ( 7 ) to show that the data user exercised all due diligence to comply with the enforcement notice concerned 被控犯第( 7 )款所订罪行的有关资料使用者,如证明他已尽所有应尽的努力以遵从有关的执行通知,即为免责辩护。