MEXICO CITY - President Felipe Calderon proposed sweeping new measures Thursday to crack down on the cash smuggling and money laundering that allow Mexican cartels to use billions in U.S. drug profits to enrich their criminal organizations, The Washington Post reports.

Legislation introduced by the Calderon administration would make it illegal to buy real estate in cash.

The new laws would also limit the purchase of vehicles, boats, airplanes and luxury goods to 100,000 pesos in cash, or about $7,700. Violators could be sentenced to five to 15 years in prison.

Criminals here are increasingly using cash transactions to launder their vast profits, according to a senior Mexican official who investigates financial crimes but spoke on the condition of anonymity because of security protocols.

The Mexican official and his counterparts in U.S. law enforcement say that billions of dollars in cash are used to buy airplanes, ranches and businesses to circumvent new Mexican laws that require banks to report large cash movements.

"This illicit money is vital for the criminal. That is what they seek, this money. It is also vital to finance their activities," said Calderon, who called the new money-laundering laws "unprecedented."

Read the entire story at washingtonpost.com