Click here to write a Letter to the Editor. New Canadian hours-of-service rules for commercial drivers took effect Monday, but officials said it was not clear when most provinces would adopt and enforce them.“The federal hours-of-service regulation [is expected to become law] on Jan. 1, but in Canada, each province must adopt and commence enforcement of the rule separately,” David Bradley, chief executive officer of the Canadian Trucking Alliance, told Transport Topics in late December.So far, he said, only Ontario has adopted the regulation. There are 10 Canadian provinces and three territories.For the full story, see the Jan. 1 print edition of Transport Topics. Subscribe today.