Question: When was smoking banned in restaurants in the state where Detroit's largest employer is located?

full_context: Document 1: Detroit: Despite the city's recent financial issues, many developers remain unfazed by Detroit's problems. Midtown is one of the most successful areas within Detroit to have a residential occupancy rate of 96%. Numerous developments have been recently completely or are in various stages of construction. These include the $82 million reconstruction of downtown's David Whitney Building (now an Aloft Hotel and luxury residences), the Woodward Garden Block Development in Midtown, the residential conversion of the David Broderick Tower in downtown, the rehabilitation of the Book Cadillac Hotel (now a Westin and luxury condos) and Fort Shelby Hotel (now Doubletree) also in downtown, and various smaller projects.
Document 2: Detroit: A number of the city's downtown employers are relatively new, as there has been a marked trend of companies moving from satellite suburbs around Metropolitan Detroit into the downtown core.[citation needed] Compuware completed its world headquarters in downtown in 2003. OnStar, Blue Cross Blue Shield, and HP Enterprise Services are located at the Renaissance Center. PricewaterhouseCoopers Plaza offices are adjacent to Ford Field, and Ernst & Young completed its office building at One Kennedy Square in 2006. Perhaps most prominently, in 2010, Quicken Loans, one of the largest mortgage lenders, relocated its world headquarters and 4,000 employees to downtown Detroit, consolidating its suburban offices. In July 2012, the U.S. Patent and Trademark Office opened its Elijah J. McCoy Satellite Office in the Rivertown/Warehouse District as its first location outside Washington, D.C.'s metropolitan area.
Document 3: Detroit: Detroit Medical Center formally became a part of Vanguard Health Systems on December 30, 2010, as a for profit corporation. Vanguard has agreed to invest nearly $1.5 B in the Detroit Medical Center complex which will include $417 M to retire debts, at least $350 M in capital expenditures and an additional $500 M for new capital investment. Vanguard has agreed to assume all debts and pension obligations. The metro area has many other hospitals including William Beaumont Hospital, St. Joseph's, and University of Michigan Medical Center.
Document 4: List of smoking bans in the United States: Statewide smoking ban: On December 7, 2006, after passage by Ohio voters on November 7, 2006, Chapter 3794 (titled ``Smoking Ban '') of the Ohio Revised Code went into effect, banning smoking statewide in all enclosed workplaces in Ohio, including bars and restaurants. The law exempts (1) private residences except when being used as a business when employees other than the owner are present, (2) designated hotel / motel smoking rooms, (3) family - owned and operated businesses not open to the public where all employees are related to the owner, (4) designated smoking areas in nursing homes, (5) retail tobacco stores, (6) outdoor patios, (7) private clubs with no employees. The law is enforced by the Ohio Department of Health, which began enforcement on May 3, 2007. A business may be fined up to $2,500 and individuals $100 for violation of the ban. Local governments may regulate smoking more stringently than the state.
Document 5: List of smoking bans in the United States: No statewide smoking ban. Instead, Tennessee's 2007 statewide smoking law, the Non-Smoker Protection Act, prohibits smoking statewide in all public places in Tennessee, except as exempted; (1) any business, including a bar or restaurant, that does not serve persons under 21, (2) designated hotel / motel smoking rooms, (3) tobacco industry - related facilities, (4) outdoor areas and areas with an open garage door, (5) nursing homes, (6) designated smoking areas not accessible to the general public in businesses with three or fewer employees, (7) private clubs, (8) private residences and vehicles unless it is being used for child care, daycare, or public transportation of children, (9) retail tobacco stores, and (10) commercial vehicles occupied solely by the operator. Local governments are preempted from regulating smoking.
Document 6: Houston: The Baylor College of Medicine has annually been considered within the top ten medical schools in the nation; likewise, the MD Anderson Cancer Center has consistently ranked as one of the top two U.S. hospitals specializing in cancer care by U.S. News & World Report since 1990. The Menninger Clinic, a renowned psychiatric treatment center, is affiliated with Baylor College of Medicine and The Methodist Hospital System. With hospital locations nationwide and headquarters in Houston, the Triumph Healthcare hospital system is the third largest long term acute care provider nationally.
Document 7: Detroit: As mayor, Young sought to revive the city by seeking to increase investment in the city's declining downtown. The Renaissance Center, a mixed-use office and retail complex, opened in 1977. This group of skyscrapers was an attempt to keep businesses in downtown. Young also gave city support to other large developments to attract middle and upper-class residents back to the city. Despite the Renaissance Center and other projects, the downtown area continued to lose businesses to the suburbs. Major stores and hotels closed and many large office buildings went vacant. Young was criticized for being too focused on downtown development and not doing enough to lower the city's high crime rate and improve city services.
Document 8: Craig Hospital: Craig Hospital is a Rehabilitation Hospital in Englewood, Colorado specializing in spinal cord injury (SCI) and Traumatic Brain Injury (TBI) rehabilitation.
Document 9: Detroit: Thousands more employees work in Midtown, north of the central business district. Midtown's anchors are the city's largest single employer Detroit Medical Center, Wayne State University, and the Henry Ford Health System in New Center. Midtown is also home to watchmaker Shinola and an array of small and/or startup companies. New Center bases TechTown, a research and business incubator hub that’s part of the WSU system. Like downtown and Corktown, Midtown also has a fast-growing retailing and restaurant scene.
Document 10: Detroit: Within the city of Detroit, there are over a dozen major hospitals which include the Detroit Medical Center (DMC), Henry Ford Health System, St. John Health System, and the John D. Dingell VA Medical Center. The DMC, a regional Level I trauma center, consists of Detroit Receiving Hospital and University Health Center, Children's Hospital of Michigan, Harper University Hospital, Hutzel Women's Hospital, Kresge Eye Institute, Rehabilitation Institute of Michigan, Sinai-Grace Hospital, and the Karmanos Cancer Institute. The DMC has more than 2,000 licensed beds and 3,000 affiliated physicians. It is the largest private employer in the City of Detroit. The center is staffed by physicians from the Wayne State University School of Medicine, the largest single-campus medical school in the United States, and the United States' fourth largest medical school overall.
Document 11: List of smoking bans in the United States: Statewide smoking ban: On May 1, 2010, after being signed into law by Governor Jennifer Granholm on December 18, 2009, the Dr. Ron Davis Law took effect, banning smoking statewide in all enclosed, indoor workplaces in Michigan, as well as the outdoor patios of bars and restaurants. The law exempts only cigar bars, retail tobacco stores, private home offices, company vehicles including commercial trucks, and Detroit's three casinos' gambling floors. The law is silent as to whether local governments may regulate smoking more strictly than the state, though it prohibits state or local health departments from enacting any smoking rules different than the law. In December 2011, a judge dismissed fines against a Warren, Michigan bar owner who had claimed that his bar's Keno machines classified his establishment as a casino exempt from the ban.
Document 12: List of smoking bans in the United States: Statewide smoking ban: Since January 1, 1995, smoking has been banned in all enclosed workplaces in California, including bars and restaurants (bars were excluded until January 1, 1998); these following areas were exempt until June 9, 2016: meeting and banquet rooms except while food or beverage functions are taking place (including set - up, service, and clean - up activities or when the room is being used for exhibit activities), retail or wholesale tobacco shops and private smokers lounges (i.e. cigar bars), truck cabs / tractors if no nonsmoking employees are present, theatrical production sites if smoking is an integral part of the story, medical research or treatment sites if smoking is integral to the research or treatment being conducted, private residences except homes licensed as family day care homes during the hours of operation and in those areas where children are present, and patient smoking areas in long - term health care facilities.
Document 13: Rehabilitation Institute of Michigan: DMC Rehabilitation Institute of Michigan (RIM) is one of the eight hospitals affiliated with the Detroit Medical Center. RIM is one of the largest, academic, rehabilitation hospitals in the United States specializing in rehabilitation medicine and research. RIM offers clinical treatment in spinal cord injury, brain injury, stroke, complex trauma and orthopedics and catastrophic injury care. The Institute is home to the Center for Spinal Cord Injury Recovery, a facility designed to implement and study innovative treatments in spinal cord injury recovery.
Document 14: List of smoking bans in the United States: Statewide smoking ban: On May 1, 2010, after being signed into law by Governor Jennifer Granholm on December 18, 2009, the Dr. Ron Davis Law took effect, banning smoking statewide in all enclosed, indoor workplaces in Michigan, as well as the outdoor patios of bars and restaurants. The law exempts only cigar bars, retail tobacco stores, private home offices, company vehicles including commercial trucks, and Detroit's three casinos' gambling floors. The law is silent as to whether local governments may regulate smoking more strictly than the state, though it prohibits state or local health departments from enacting any smoking rules different than the law.
Document 15: Detroit: The city's Greektown and three downtown casino resort hotels serve as part of an entertainment hub. The Eastern Market farmer's distribution center is the largest open-air flowerbed market in the United States and has more than 150 foods and specialty businesses. On Saturdays, about 45,000 people shop the city's historic Eastern Market. The Midtown and the New Center area are centered on Wayne State University and Henry Ford Hospital. Midtown has about 50,000 residents and attracts millions of visitors each year to its museums and cultural centers; for example, the Detroit Festival of the Arts in Midtown draws about 350,000 people.
ground_truth: May 1, 2010
sub_queries: What is the largest employer in Detroit? Answer: Detroit Medical Center
Detroit Medical Center >> located in the administrative territorial entity Answer: Michigan
when was smoking banned in restaurants in Michigan Answer: May 1, 2010