e. No person shall stop, stand or park a vehicle, commercial or otherwise, in a ZEV Commercial Loading Zone designated for the exclusive use by zero- emission commercial delivery vehicles. However, a zero-emission commercial delivery vehicle also may stop, stand or park in a Commercial Loading Zone. A commercial delivery vehicle in either zone, shall stop, stand or park only for the purpose of loading or unloading freight, goods, or parcels for the time necessary to do so, but not for a period exceeding 30 minutes, except in a ZEV Commercial Loading Zone for a maximum of one hour where signs indicating a one hour limit are posted, and except as provided in Section 88.01.1 of this chapter. ZEV Commercial Loading Zones shall be in effect during the hours and on days indicated by posted signs, or if none, between the hours of 7:00 a.m. and 6:00 p.m. (Added by Ord. No. 187,117, Eff. 8/7/21.) 3. No person shall stop, stand or park a vehicle in any short-time parking limit zone for a period of time longer than that indicated by posted signs or curb markings. Such time limit shall be fifteen minutes unless the Department determines, pursuant to Subsection (c) above, that the public welfare requires a longer period, in which latter case the time limit shall be thirty minutes. Such time limits shall be in effect during the hours and on the days indicated by posted signs, or if none, between the hours of 8:00 o’clock A.M. and 6:00 o’clock P.M. on any day except Sunday. 4. No person shall stop, stand or park a vehicle at any time in any red “ No Stopping ” zone or portion of street posted with signs reading “ No Stopping Any Time ”, except that a bus may stop in such zone or portion of street marked or sign posted as a bus stop. Such “ No Stopping ” zones shall be in effect during all times unless limited to specified hours and/or days by posted signs. (f) Markings for Zones . 1. Passenger Loading zones when designated by painted curbs shall be white and stenciled “ Passenger Loading Only .” (a) White curb zones may also be stenciled “ Mailbox Deposit Only ” when designated for this purpose. 2. Commercial Loading Zones when designated by painted curbs shall be YELLOW and stenciled “ Loading Only .” (Amended by Ord. No. 111,487, Eff. 6/28/58.) 3.