Technically — and legally — Manteca households can’t revert to watering landscaping until Oct. 19. That’s because the municipal ordinance approved unanimously by the City Council Tuesday to make that happen under state law requires a second vote and then a 30-day period before it goes into effect. In the meanwhile, City Manager Toni Lundgren Thursday said municipal staff will not cite anyone that waters a third day. … An unless three of the council members flip their vote on the second reading of the ordinance likely to take place Sept. 19, it will be legal to water three days a week starting Oct. 19.