LOS ANGELES—With one member withholding his vote, the Los Angeles City Council was forced Sept. 29 to delay by one week a decision on a proposed ordinance that would require people to show proof of full COVID-19 vaccination before entering many indoor public spaces. Councilman Joe Buscaino invoked a City Council rule to withhold unanimous consent, effectively preventing the council from voting on the ordinance on its first reading. Ordinances that don’t receive unanimous approval on their first reading must return for a second vote. The council will consider the ordinance next week, when it will need just eight votes to pass, or 12 votes to pass with an urgency clause allowing it to take effect immediately, instead of one month from publication. Since voting 13-0 on Aug. 11 to request the ordinance be prepared by the city attorney, a majority of council members have expressed support for the measure …