That between November 1st and April 1st, no person shall park a motor vehicle on any street between the hours of 3:00 a.m. and 6:00 a.m., or those days when an accumulation of snow requires that the city snowplows and clears such streets. During a snow or ice emergency the parking or standing of a motor vehicle on a public street or highway in the city shall be prohibited during the term of such emergency. Sidewalks must be cleared within 48 hours of the cessation of the snow event. No person shall pile, dump or place snow, ice or any other material on any sidewalk or public street in the city. Snow or ice shall not be plowed or moved across a public street or otherwise disposed of in any other place or in a manner so as to create a safety hazard to the people of the city.