There is no generally agreed definition of ''business casual''. One definition of business casual states that it includes khaki pants, slacks, and skirts, as well as short-sleeved polo shirts and long-sleeved shirts, but excludes jeans, tennis shoes, tight or short skirts, T-shirts, and sweatshirts. Another source, an American university careers service, states that business casual consists of neutral colors more towards the dark shades of black, gray, navy, but can include white and off white, and reminds that the clothing should be pressed and have clean, crisp seams. The ''Dress for Success'' advice from the University of Toronto sums up business casual as ''a classic, clean cut, and put together look where a full suit is not required,'' which means slacks, khakis, or skirts; blouses, polo shirts, or shirts with collar but no necktie; some sweaters; and closed-toe shoes. The Canadian university ends with the warning that ''it is not clothing you would wear to a club or for athletic purposes... Don't let the word casual mislead you. You still need to look professional.''
can you wear a polo for business casual?
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Answer: yes

The alcohol laws of the United States regarding minimum age for purchase have changed over time. The history is given in the table below. Unless otherwise noted, if different alcohol categories have different minimum purchase ages, the age listed below is set at the lowest age given (e.g. if the purchase age is 18 for beer and 21 for wine or spirits, as was the case in several states, the age in the table will read as ''18'', not ''21''). In addition, the purchase age is not necessarily the same as the minimum age for consumption of alcoholic beverages, although they have often been the same.
is the drinking age 21 in all us states?
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Answer: no

Under the Switchblade Knife Act of 1958 (amended 1986, codified at 15 U.S.C. 1241--1245), switchblades and ballistic knives are banned from interstate shipment, sale, or importation, or possession within the following: any territory or possession of the United States, i.e. land belonging to the U.S. federal government; Indian lands (as defined in section 1151 of title 18); and areas within the maritime or territorial jurisdiction of the federal government, with the exception of federal, state law enforcement agencies and the military. In addition, federal laws may prohibit the possession or carrying of any knife on certain federal properties such as courthouses or military installations. U.S. federal laws on switchblades do not apply to the possession or sale of switchblade knives within a state's boundaries; the latter is regulated by the laws of that particular state, if any.
is it illegal to carry a knife in usa?
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Answer:
yes