IPA: /ˌʌnɪnˈfɔrst/
KK: /ʌnɪnˈfɔrst/
Not put into action or applied; not enforced by rules or laws.
The regulations are unenforced, so many people ignore them.
Unenforced → It is formed from "un-" (meaning not) and "enforce" (from Old French *enforcier*, meaning to strengthen or compel). The word "unenforced" means not compelled or not made to happen by force.
Think of something that is 'not' ('un-') being 'compelled' ('enforce') — that's why unenforced means it is not made to happen by force.