Government regulations

FILE - In this June 8, 2019, file photo, two women smoke cannabis vape pens at a party in Los Angeles. California officials announced Monday, Jan. 27, 2020, that marijuana vape cartridges seized in illegal shops in Los Angeles contained potentially dangerous additives, including a thickening agent blamed for a national outbreak of deadly lung illnesses tied to vaping. (AP Photo/Richard Vogel)

In this Jan. 9, 2020, photo provided by the Anti-Poaching Special Squad, the exterior of a store suspected of selling trafficked wildlife is seen in Guangde city in central China's Anhui Province. The outbreak of a new virus linked to a wildlife market in central China is prompting renewed calls for enforcement of laws against the trade in and consumption of exotic species. (Anti-Poaching Special Squad via AP)

FILE - In this Jan. 29, 2017 file photo, demonstrators carrying signs chant as they protest outside of the White House in Washington during a demonstration to denounce President Donald Trump's executive order banning travel to the U.S. by citizens of Iraq, Syria, Iran, Sudan, Libya, Somalia and Yemen. Trump's travel ban on travelers from predominantly Muslim countries is headed back to a federal appeals court, three years after it was first imposed. On Tuesday, Jan. 27, 2020, the 4th U.S. Circuit Court of Appeals in Richmond is scheduled to hear arguments in three lawsuits filed by U.S. citizens and permanent residents whose relatives have been unable to enter the U.S. because of the ban. (AP Photo/Jose Luis Magana, File)

A worker wearing a hazardous materials suit stands at the entrance to a subway station in Beijing, Sunday, Jan. 26, 2020. The new virus accelerated its spread in China, and the U.S. Consulate in the epicenter of the outbreak, the central city of Wuhan, announced Sunday it will evacuate its personnel and some private citizens aboard a charter flight. (AP Photo/Mark Schiefelbein)

A man burn joss sticks as he prays at the Wong Tai Sin Temple, Friday, Jan. 24, 2020, in Hong Kong, to celebrate the Lunar New Year which marks the Year of the Rat in the Chinese zodiac. China is expanding its lockdown against the deadly new virus to an unprecedented 36 million people and rushing to build a prefabricated, 1,000-bed hospital for victims as the outbreak cast a pall over Lunar New Year, the country’s biggest and most festive holiday. (AP Photo/Achmad Ibrahim)

File - In this Friday, April 5, 2019, file photo, a customer takes a photo of large jars of marijuana from on display for sale at Rev-Up a cannabis marketplace in Los Angeles. California is trying a new strategy to cut into the state's huge illegal marijuana market. State regulators have proposed rules that would require legal shops to post their unique quick response code certificates in storefront windows to help consumers identify licensed businesses. Shoppers would use their smartphones to scan the familiar, black-and-white codes, similar to a bar code, to determine if a business is selling legal, tested cannabis products. (AP Photo/Richard Vogel, File)

A restaurant sign alerts customers that it's "now cashless," Thursday Jan. 23, 2020, in New York. Lawmakers in New York City were voting Thursday on a measure to require stores and restaurants to accept cash. Critics of the cash-free business model say it discriminates against people who don't have bank accounts or who prefer to use cash. (AP Photo/Bebeto Matthews)

FILE - In this Sept. 2017 file photo, a flag is waved outside the White House, in Washington. The Trump administration is coming out with new visa restrictions aimed at restricting a practice known as “birth tourism." That refers to cases when women travel to the United States to give birth so their children can have U.S. citizenship. (AP Photo/Carolyn Kaster)