SANTA FE, N.M. (AP) — Marijuana aficionados and entrepreneurs across New Mexico are bracing for the April 1 start of state-regulated retail marijuana.

New Mexico joins 17 other states that have legalized recreation marijuana without significant legal challenges.

The start date for sales ushers in a new era for cannabis as big business with implications for law enforcement, scarce water resources, economic opportunity and cannabis tourism along the state line with Texas. Here are a few things to know.

OPENING DAY

Starting at midnight on April 1, all adults 21 and up will be allowed to buy up to 2 ounces (57 grams) of marijuana at retail outlets throughout the state. It’s enough pot to stuff a sandwich bag or roll about 60 joints or cigarettes.

The changes take effect 15 years after the state first began offering medical marijuana to help people endure afflictions including cancer, and a portion of future supplies are being reserved for cannabis patients.

Democratic Gov. Michelle Lujan Grisham and allied lawmakers hope that broad legalizing of marijuana will stamp out black markets, boost employment and provide a stable new sources of government income.

Growing pains are guaranteed as retailers stock new shelves and cannabis cultivators scale up production to meet uncertain demands that include tourists from Texas, which still mostly prohibits marijuana. [Read More @ AP.com]