OTTAWA -- Potheads beware: The Conservative government has no plans to relax marijuana laws as arrests in some regions are expected to rise.

A spokesman for Justice Minister Vic Toews was brusque when asked if the Tories would resurrect Liberal efforts to decriminalize simple possession of marijuana.

"It is a very short answer and the answer is no," said Mike Storeshaw. "We have no plans to bring any bill forward."

Public toking became more common in parts of Canada as the former government moved to loosen laws. Three young men walking along Ottawa's Wellington Street openly passed a joint between them Tuesday as they strolled through the shadow of Parliament's Peace Tower.

But police in some areas are once again cracking down.

"I think we're in a dark period right now," said Alan Young, a marijuana activist and professor at Osgoode Hall Law School in Toronto. "They're going after growers and seed dealers, and more people are being charged with simple possession."

Liberals moved to treat possession of less than 15 grams of pot -- roughly 20 joints -- as a minor offence punishable by fines of $100 to $400, much like traffic tickets.

But the most recent related bill died when the last federal election was called in November.

Before that, the Liberals were harshly rebuked by legislators in the United States. Former American ambassador Paul Cellucci hinted of border tie-ups if Canadian pot laws were eased.

U.S. protests continued despite the fact that several U.S. states have already decriminalized marijuana in much the same way.

Young says pot activists fighting to keep the cause alive are out of luck, but not forever.

"It's dead -- for the time being," he said. "This issue goes in cycles."

Young predicts that Ottawa won't be able to indefinitely ignore a growing number of pot users.

"We're a drug-consuming culture and we've got to start regulating it."

Pot is the most popular illicit drug in the country, says the Canadian Centre on Substance Abuse.

A major national survey released in 2004 found that about 15 per cent of the adult population had used cannabis in the year before, up from seven per cent in 1994. That number jumped to almost 29 per cent among university students, and was at least 23 per cent for those aged 13 to 18.

While in opposition, Toews assailed the Liberals for moving to increase pot demand while at the same time cracking down on suppliers with tougher trafficking penalties.