The municipality prohibits parking on the main road. (Passive Voice)

Parking on the main road is prohibited by the municipality

Parking on the main road was prohibited by the municipality

Parking on the main road should prohibited by the municipality

Parking on the main road will be prohibited by the municipality

All are wrong

Explanation

This question belongs to Present Indefinite Tense.

Active voice formula: Subject + verb + object + other words (The municipality prohibits parking on the main road)

Passive voice formula: Object + is/am/are + third form of a verb + by + subject + other words (Parking on the main road is prohibited by the municipality)