Must at the start of the paragraph, means you can be prosecuted for not adhering to it. So you are wrong.Only a 'code' for guidance, not the law
"Many of the rules in The Highway Code are legal requirements, and if you disobey these rules you are committing a criminal offence. You may be fined, given penalty points on your licence or be disqualified from driving. In the most serious cases you may be sent to prison. Such rules are identified by the use of the words ‘MUST/MUST NOT’. In addition, the rule includes an abbreviated reference to the legislation which creates the offence."
I hope you are not a road user.
Read online New Official Highway Code UK valid for 2020. The Highway Code applies to England, Scotland and Wales and is essential reading for every road user. Applies to pedestrians, cyclists, motorcyclists and horse riders as well as drivers