These put a strict ban on ambush marketing in the restricted area.

The strict ban includes all charity badges, bracelets and motifs.

Three acts that were introduced later in the 20th century, offered some exceptions from the strict ban.

These were known as the hai jin laws, a strict ban on private maritime activity until its formal abolishment in 1567.

The state council said yesterday that the 'three strict bans', on trade, transport and byproducts, would continue to be enforced.