随着现场指示和命令在加利福尼亚州的北部县生效，承包商，地方和州官员正试图破译对削减Covid-19的前所未有的反应中的“必不可少”的定义。

[For ENR’s latest coverage of the impacts of the COVID-19 pandemic, click here]

Alameda，Contra Costa，Marin，Monterey，Sacramento，San Francisco，Santa Clara，Santa Cruz，San Mateo和Sonoma县都发布了现场指令或订单。订单要求居民待在家里，除了获得或提供基本服务，该服务目前包括影响公共工程和基础设施的建筑，而指令是建议。

San Francisco’s现场庇护所ordinance allows work to continue on construction of public works, housing, airport operations, water, sewer, gas, electrical, oil refining, roads and highways, public transportation, solid waste collection and removal, internet and telecommunications. Work must comply with social distancing standards where possible.

加利福尼亚相关总承包商的首席执行官彼得·泰特西（Peter Tateishi）说，对于大多数湾区建筑公司而言，3月17日都是业务，但他说，许多人对该指令缺乏具体细节感到困惑，并且正在质疑政府是否会阐明基本工作的定义。

In addition, questions abound as to whether shelter-in-place orders allow workers to cross city and county lines to work in areas with different directives.

Generally, residents who live in a county subject to shelter-in-place orders must stay home, except to travel to essential services, including work that provides one of those services, says Daniel Engler, partner at San Francisco’s Cox Castle and Nicholson who specializes in real estate transaction law.

“It’s fairly case specific and business specific, so it’s hard to answer generally – for any particular business or industry or job site, you need to figure out exactly what is being done and what is permissible or not permissible under the order and go from there,” says Engler.

“Employers are making judgement calls,” says Tateishi. AGC of California members are concerned about the impact of possible project delays caused by reduced city permitting staff or the closure of businesses not deemed essential.

项目开发主管戴夫•瓦伦丁contractor Hensel Phelps in Northern California, says the majority of its work in affected counties falls under essential services for public works projects, including those at airports, hospitals and a new county emergency operations center.

Valentine说：“我们的工作网站正在逐案进行工作，取决于项目是否属于'基本服务'。”18luck官网“我们知道环境将继续发展，但是只要我们与我们的人民，客户，设计伙伴和贸易伙伴有效沟通，我们就会适应并适应我们的一切。”

Los Angeles Mayor Eric Garcetti said at a March 17 press conference that a shelter-in-place order is not imminent for the city and that construction is essential and will continue. The mayor’s office did not immediately respond to questions for additional comment.

Officials in San Francisco’s mayor’s office and public works department were not available for immediate comment for clarification.