New Tennessee laws will go into effect starting Friday. Among those will be legislation raising the minimum age required to buy tobacco products, ensuring 911 operators can provide CPR instructions to callers, and easing access to accommodations for pregnant woman in the workplace. On top of these new state laws, Johnson City will also begin enforcing the next step of an ordinance that phases out chaining animals. Johnson City commissioners approved the changes in November 2019, which introduced rules on Jan. 1, 2020, limiting the number of consecutive hours that a dog or puppy could be tethered or chained outside. Starting Jan. 1, 2021, no dog may be tethered or chained and left unattended in city limits.