High rollers visiting B-C casinos will be facing some new rules, following recommendations meant to prevent money laundering. Anyone spending 10-thousand dollars or more at casinos within a 24-hour period must now prove the source of their funds. The change from the B-C Lottery Corp. follows a review by former R-C-M-P deputy commissioner Peter German. Attorney General David Eby launched the review in response to a report that Richmond’s River Rock Casino had accepted 13.5 million dollars in 20-dollar bills within one month — which police said could be proceeds of crime.