California’s historic drought rules are going to be a whole lot looser this summer. In a major shift, the administration of Gov. Jerry Brown announced Monday plans to drop all statewide mandatory water conservation targets it had imposed on urban areas last June. The new rules, which are expected to be approved May 18 by the State Water Resources Control Board, would instead allow more than 400 cities, water districts and private companies to each set their own water conservation targets, as long as they report them to state officials.