Yes it does say that....
Rule 248
"You MUST NOT park on a road at night facing against the direction of the traffic flow unless in a recognised parking space."
And from the introduction...
"Many of the rules in the 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. An explanation of the abbreviations can be found in 'The road user and the law'."