Acctually Alberta is a bit mixed up when it comes to commercial vehicles. I will try to break it down for you.

Trip Inspections:
As of July 1st 2009 all commercial vehicles registered at 4500 and higher need to have daily trip inspections done; however on units registered 4500 - 11,793 it only needs to be a visual. That being said an inspector may ask to see the inspection criteria from the National Safety Code 13 Shedule 1. A driver must be able to produce this if asked. If you are registered over 11,793 you must do a written trip inspection and be able to produce it if asked.

Annual Inspections:
Commercial vehicles ove 11,793 must have an annual COmmercial Vehicle Inspection done on them by a licensed facility.

Weigh Scales:
All commercial vehicles registered over 4500 must report to a weigh scale even if you are not loaded.

Log Books:
Not required unless you are registered ove 11,793. Even then you may be exempt if you meet certain criteria.

If you look on Albeta's website under the ministry of transport you can access all the applicable regulations.

Also keep in mind that if you leave Alberta the rules all change. Alberta is probibly the most lienient when it comes to commercial vehicles.

Hope this helps you out.