Extremely important or urgent; absolutely necessary.
“It is imperative that the city address the parking shortage before the new mall opens.”
“Given the rising number of accidents, it is imperative to install traffic lights at this intersection.”
Use 'imperative' in Task 2 when stressing that immediate action is necessary, such as 'it is imperative that the city implement this change'. It is a strong way to emphasize urgency in your recommendation and shows the marker confident, high-level language.
Synonyms: essential, crucial, vital