The Amr and Nahi forms are both classified as Khass. Which conclusion about اِفْعَلْ and لَا تَفْعَلْ is correct?

Nahi: Definition and Form

• Their classification is shared, but one asks for action and the other for restraint.
• Their classification is shared, so both ask for the act to be performed.
• Their classification is shared, so both ask for the act to be avoided.
• Their classification is shared, so both only report whether an act occurred.