Diners can no longer claim ignorance over the 1,950 calories contained in one Bloomin’ Onion: Chains with 20 or more locations will be legally required to display calorie content on menus starting on Monday, CNN reports, when a long-delayed Affordable Care Act provision finally goes into effect.

The new law applies not only to fast-food chains and sit-down restaurants, but also other businesses that sell food and beverages including convenience stores, movie theaters, grocery stores, and even vending machines.

The calorie count guidelines were included in the original ACA that was passed back in 2010 and were originally slated to take effect in 2011, but implementation has been delayed numerous times, largely thanks to lobbying from the restaurant industry. Numerous chains such as McDonald’s, Starbucks, and Chipotle have already put menu labeling into effect in recent years in anticipation of the new guidelines, but any restaurants with 20-plus locations that haven’t yet done so will seemingly have plenty of time to get their acts together: Per CNN, “the FDA announced that over the course of the next year officials will seek to educate the industry about meeting the new rules, rather than enforcing them.”

Some have argued that this rule is bad for business, saying it’s expensive to implement, since restaurants have to get new menu boards printed and pay for pricey nutritional analysis of their dishes (if they don’t already have that information available). There’s also the concern that some diners will be aghast at just how many calories some of their favorite menu items contain, and then stop ordering them. The pizza industry in particular has lobbied hard against the calorie count law.

Meanwhile, supporters of the new rule say restaurants need to be held accountable for the unhealthy items they serve, and that displaying calorie count info will help consumers make better choices. While recent studies have indicated that calorie counts on menus don’t have much of an effect on what people choose to order, they may be somewhat effective in pushing the restaurants themselves to offer lower-calorie foods.

• Obamacare’s Calorie Count Rules Go Into Effect [CNN]

• Why Are Calorie Counts on Menus So Controversial? [E]