Budget raises duty-free limit for cross-border travellers
 

Starting June 1, travelers returning from a 24-hour trip can spend $200 at the duty-free shop, four times the current $50 limit. Anyone coming home from a 48-hour absence can legally cross the border with $800 worth of goods, double the current limit. The seven-day exemption was bumped, too, but only by $50 to $800.

http://www.nationalpost.com/m/wp/news/blog.html?b=news.nationalpost.com/2012/03/29/budget-raises-duty-free-limit-for-cross-border-travellers

so 48h is $800, and theres no more 7 day anymore?

7 days = $800 (up from 750)