The Privacy and Electronic Communications (EC Directive) Regulations 2003 altered the consent requirement for most electronic marketing to "positive consent" such as an opt-in box.
2003年隐私和电子通信（EC指令）规例改变了適用於大多数电子营销的同意要求，必需要“主動同意”，比如在选择框選擇「同意」。