The snow emergency parking prohibition shall being when the snow emergency takes effect, one hour after the mayor, D.P.S. superintendent, or chief of police, has declared a snow emergency. The prohibition shall end when both the following conditions have been satisfied:

1. The snow, sleet, or ice has stopped, and

2. An individual street has been completely plowed by the city from curb-to curb

The parking prohibition shall expire 36 hours after the weather conditions creating the emergency have stopped, unless the snow emergency is extended by action of the mayor, D.P.S. superintendent or chief of police. Such an extension shall require that the procedures outlined in section 340-23 (52-35) of this article be repeated.