A. No person shall stand or park a vehicle in a street other than parallel with the edge of the roadway, headed in the direction of lawful traffic movement and with the curbside wheels of the vehicle within twelve inches of the edge of the curb, except where the street is marked or signed for angle parking and except as provided in subsection (E) of this section.

B. Where parking space markings are placed on a street, no person shall stand or park a vehicle other than in the indicated direction and, unless the size or shape of the vehicles makes compliance impossible, within a single marked space.

C. The operator who first begins maneuvering his vehicle into a vacant parking space on a street shall have priority to park in that space, and no other vehicle operator shall attempt to deprive him of his priority or block his access.

D. Whenever the operator of a vehicle discovers that his vehicle is parked close to a building to which the fire department has been summoned, he shall immediately remove the vehicle from the area, unless otherwise directed by police or fire officers.

E. In the event of a snow condition as defined in Section 10.68.020(C) of this code, parking of vehicles headed in the direction opposite to the direction of lawful traffic movement shall be permitted in the R l, R 2 and R 3 zones as designated in Chapter 17.03 of this code