An hour before the open house on Saturday afternoon, a real estate agent paced across the dark bamboo floors, straightening the throw blanket, fluffing the pillows and lighting a scented candle.

The last-minute sprucing at the $1.2 million condo in Jersey City, N.J., was exactly what agents have done at open houses for decades before this weekend.

The difference now is the information they are required to disclose and where they can disclose it when it comes to real estate commissions — a charge that had hovered between 5 to 6 percent of the sales price, and until now was typically paid by the seller and split between the seller’s agent and the buyer’s agent.

The changes that went into effect this weekend decouple the two commissions: Sellers are no longer expected to pay buyers’ commissions, though they can still choose to do so, and the proposed commission split can no longer be advertised on the online database commonly used to sell homes, the M.L.S.

The new rules went into effect across the United States as part of a $418 million settlement agreement with the National Association of Realtors, a powerful real estate trade group that was successfully sued by a group of homeowners in Missouri who argued that the longtime practice requiring them to pay agents’ commissions led to inflated fees. Brokerages have spent months trying to educate agents and consumers on the looming changes.

But when they were implemented nationwide this Saturday, buyers remained befuddled.