Statutes are passed by the federal government and in each provincial jurisdiction each year. Statutes passed may be new statutes or amendments of earlier statutes. The law, then, is the original act and any subsequent amendments to that act. Periodically, statutes and their amendments are gathered together and reissued as "Revised Statutes." Statutes are designated as statutes (S) or revised statutes (R.S.). There is also supporting legislation called "Regulations."
You can locate Canadian statutes online using CanLII. You can search the database by statute title, citation, or keywords. When viewing a statute, clicking the "Note Up" tab link will allow you to "note up" the act. Noting up a statute shows you a list of cases and other statutes that cited the act you're viewing. You can also note up a specific section of the act by entering the section number in the designated box. These cases and laws might be helpful to your research.
For more information on searching CanLII, see the following video.
Other Online Sources
You can also find legislation on official government websites (e.g., Government of Canada, Nova Scotia), and print versions are available in the Primary Sources Room on the second floor of the library. Statutes for US, UK, and Commonwealth countries are also available in the Primary Sources Room.
For laws in other provinces, visit the Legislation guide.