Colin Dwyer

Across the country, U.S. residents have awakened to a new year, new resolutions — and a whole host of new rules to keep track of. Hundreds of new state laws took effect across the country Monday, and they're sure to reshape the political and legal landscape in the coming months.

They run a vast gamut — from recreational marijuana and paid leave time, to traveling barbers and exotic pets — so you'll have to forgive us if we pick just a few to focus on. Here is a glimpse of some notable new laws, in brief.

As China steps into the new year, it is doing so without a once-thriving facet of its economy: the ivory trade. The country's ban on the domestic sale and processing of ivory and its products took effect on Sunday, making good on a commitment Chinese authorities made at the beginning of 2017.

Updated at 8:20 p.m. ET

Nearly three months since Catalans cast their votes for independence from Spain, setting off a weekslong showdown between their regional government and Madrid, Catalonia opened its polls again on Thursday — and promptly put pro-independence parties back in control, by a very slim margin.

Updated at 1:30 p.m. ET

The United Nations General Assembly has overwhelmingly rejected the Trump administration's decision to recognize the disputed city of Jerusalem as Israel's capital. By a 128-9 vote Thursday, the diplomats gathered in New York City ignored U.S. objections and approved a nonbinding resolution calling on countries to avoid moving their embassies to Jerusalem.

It has been roughly eight months since cholera first took hold in war-torn Yemen. In that brief span, the waterborne disease has exacted a staggering toll on the country's population — and that toll only continues to rise by the day.

The number of suspected cases of cholera has crossed one million, the International Committee of the Red Cross announced Thursday. Of those who have contracted the disease since April, the World Health Organization believes more than 2,200 people have died of it — almost a third of whom are children.

Venus Williams will not be charged in the collision that led to the death of a passenger in another car in Florida earlier this year, according to multiple media outlets quoting local police. The decision marks a reversal from authorities' initial assessment of the accident, which had laid fault primarily with the longtime tennis icon.

A federal judge declared a mistrial Wednesday in the case against rancher Cliven Bundy, his two sons and another self-styled militiaman. The men had been charged with conspiracy and assault after their 2014 dispute over cattle-grazing rights in Nevada developed into an armed standoff with federal agents.

For the past few days, the weather in Southern California granted firefighters a rare reprieve. Winds dropped, humidity ticked up a tad — and for a brief span, at least, firefighters had a little natural help reining in the massive Thomas Fire northwest of Los Angeles, which they had 60 percent contained by Wednesday morning.

But that lull didn't last long.

Olympic medalist McKayla Maroney has filed a lawsuit against USA Gymnastics, saying the organization sought to silence her claims of sexual abuse against disgraced team doctor Larry Nassar last year.

It wasn't supposed to be this way.

Pluck just about any Christmas carol off FM radio, and you've got a decent shot it'll be lauding the merits of a tree — a glorious yuletide pine with "lovely" branches, say, or with happy campers rockin' around it. In other words, carolers typically try to avoid comparing their Christmas tree to a toilet brush.

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