Question: When did the drinking age change to 21 in the state where U.S. area code 715 is located?

full_context: Document 1: Area code 575: Area code 575 is an area code in the U.S. state of New Mexico. It serves the remainder of the state outside the Albuquerque, Santa Fe, Farmington, and Gallup metropolitan and micropolitan areas, which remain in area code 505. The new code became effective on October 7, 2007, splitting from area code 505.
Document 2: Area codes 843 and 854: Area codes 843 and 854 serve the eastern third of South Carolina. They cover the Grand Strand, the Lowcountry, the Pee Dee, and the Sandhills. Major cities in the region include Myrtle Beach, Charleston, Beaufort, Hilton Head Island and Florence. 843 is the main area code, while 854 is an overlay that was implemented in 2015.
Document 3: Alcohol laws of New York: In response to the National Minimum Drinking Age Act in 1984, which reduced by up to 10% the federal highway funding of any state which did not have a minimum purchasing age of 21, the New York Legislature raised the drinking age from 19 to 21, effective December 1, 1985. (The drinking age had been 18 for many years before the first raise in 1984, to 19.) Persons under 21 are prohibited from purchasing alcohol or possessing alcohol with the intent to consume, unless the alcohol was given to that person by their parent or legal guardian. There is no law prohibiting where people under 21 may possess or consume alcohol that was given to them by their parents. Persons under 21 are prohibited from having a blood alcohol level of 0.02% or higher while driving.
Document 4: Alcohol laws of Wisconsin: The drinking age in Wisconsin is 21. Those under the legal drinking age may be served, possess, or consume alcohol if they are with a parent, legal guardian, or spouse who is of legal drinking age. Those age 18 to 20 may also possess (but not consume) alcohol as part of their employment.
Document 5: Alcohol laws of Wisconsin: The drinking age in Wisconsin is 21. Those under the legal drinking age may be served, possess, or consume alcohol if they are with a parent, legal guardian, or spouse who is of legal drinking age. Those age 18 - 20 may also be served, possess or consume alcohol if they are with a parent, legal guardian, or spouse who is of legal drinking age. Those age 18 to 20 may also possess (but not consume) alcohol as part of their employment.
Document 6: National Minimum Drinking Age Act: The National Minimum Drinking Age Act of 1984 (23 U.S.C. § 158) was passed by the United States Congress on July 17, 1984. It was a controversial bill that punished every state that allowed persons below 21 years to purchase and publicly possess alcoholic beverages by reducing its annual federal highway apportionment by 10 percent. The law was later amended, lowering the penalty to 8 percent from fiscal year 2012 and beyond.
Document 7: Area code 931: North American area code 931 is the telephone area code serving a horseshoe - shaped region of 28 counties in Middle Tennessee. It covers almost all of Middle Tennessee except for the Nashville metropolitan area.
Document 8: Area codes 978 and 351: Area code 978 was created as a split from area code 508 on September 1, 1997 and covers north central and most of northeastern Massachusetts (LATA code 128). Use of 978 became mandatory February 1, 1998. Prior to when this area was served by 508 (July 1988), it was served only by the 617 area code, along with the rest of the eastern two - thirds of the state. 351 has been sharing the service area since May 2, 2001. Since then, 10 digit local dialing is mandatory.
Document 9: Area codes 587 and 825: Area codes 587 and 825 are telephone area codes that cover all of Alberta, Canada, in addition to the incumbent codes, southern Alberta's 403 and northern Alberta's 780. Numbers in area code 587 started being allocated in late 2008. The new area codes overlay 403 and 780 simultaneously, covering the entire province, and make 10 - digit dialing necessary throughout Alberta.
Document 10: U.S. history of alcohol minimum purchase age by state: From 1976 to 1983, several states voluntarily raised their purchase ages to 19 (or, less commonly, 20 or 21), in part to combat drunk driving fatalities. In 1984, Congress passed the National Minimum Drinking Age Act, which required states to raise their ages for purchase and public possession to 21 by October 1986 or lose 10% of their federal highway funds. By mid-1988, all 50 states and the District of Columbia had raised their purchase ages to 21 (but not Puerto Rico, Guam, or the Virgin Islands, see Additional Notes below). South Dakota and Wyoming were the final two states to comply with the age 21 mandate. The current drinking age of 21 remains a point of contention among many Americans, because of it being higher than the age of majority (18 in most states) and higher than the drinking ages of most other countries. The National Minimum Drinking Age Act is also seen as a congressional sidestep of the tenth amendment. Although debates have not been highly publicized, a few states have proposed legislation to lower their drinking age, while Guam has raised its drinking age to 21 in July 2010.
Document 11: Area codes 715 and 534: North American telephone area codes 715 and 534 are state of Wisconsin area codes covering most of the northern part of the state.
Document 12: Area code 607: North American area code 607 is a state of New York telephone area code servicing parts of its Southern Tier (which borders Pennsylvania). It was split from parts of area codes 315 and 716 in 1954. Initially, in the late 1940s, area codes with a middle digit of ``0 ''(x0x - xxx - xxxx) were assigned only to jurisdictions covering an entire state. Along with 507 in Minnesota and 606 in Kentucky, 607 was among the first such area codes to be added to a jurisdiction.
Document 13: Area codes 508 and 774: Area codes 508 and 774 are North American Numbering Plan (NANP) telephone area codes for the U.S. state of Massachusetts. This service area currently includes south - central and most of southeastern Massachusetts (LATA code 128). It includes Worcester, Outer south & southwest Greater Boston (such as the MetroWest region), as well as Fall River, New Bedford, Cape Cod, Martha's Vineyard, and Nantucket.
Document 14: Alcohol laws of New York: In response to the National Minimum Drinking Age Act in 1984, which reduced by up to 10% the federal highway funding of any state which did not have a minimum purchasing age of 21, the New York Legislature raised the drinking age from 19 to 21, effective December 1, 1985. (The drinking age had been 18 for many years before the first raise on December 4th, 1982, to 19.) Persons under 21 are prohibited from purchasing alcohol or possessing alcohol with the intent to consume, unless the alcohol was given to that person by their parent or legal guardian. There is no law prohibiting where people under 21 may possess or consume alcohol that was given to them by their parents. Persons under 21 are prohibited from having a blood alcohol level of 0.02% or higher while driving.
Document 15: Alcohol laws of Wisconsin: The 1983 Wisconsin Act 74, effective July 1, 1984, created a drinking age of 19. Meeting in special session at the call of the governor, the legislature enacted 1985 Wisconsin Act 337, which raised the drinking age to 21 and brought the state into compliance with the NMDA (National Minimum Drinking Age) on September 1, 1986.
ground_truth: September 1, 1986
sub_queries: where is area code 715 located in us Answer: Wisconsin
when did the drinking age change to 21 in Wisconsin Answer: September 1, 1986