A Cabinet Minister or backbench Member proposing a bill first moves for the House's "leave" to introduce it. This is given automatically and without debate or vote. Next comes the motion that the bill be read a first time and printed. This also is automatic and without debate or vote. On a later day comes the motion for second reading. This is the stage at which Members debate the principle of the bill. If it passes second reading, it goes to a committee of the House, usually a standing committee. Each such committee may hear witnesses, and considers the bill, clause by clause, before reporting it (with or without amendments) back to the House. These committees have between seven and 15 members, and the parties are represented in proportion to their strength in the House itself. Some bills, such as appropriation bills (based on the Estimates), which seek to withdraw money from the Consolidated Revenue Fund, are dealt with by the whole House acting as a committee.
Committees, sitting under less formal rules than the House, examine bills clause by clause. Each clause has to be passed. Any member of the committee can move amendments. When all the clauses have been dealt with, the chairperson reports the bill to the House with any amendments that have been adopted.
When a committee has reported the bill to the House, Members at this "report stage" may move amendments to the various clauses (usually, amendments they have not had the opportunity to propose in committee). When these have been passed, or rejected, the bill goes to third reading. If the motion for third reading carries, the bill goes to the Senate, where it goes through much the same process. Bills initiated in the Senate and passed there come to the Commons, and go through the same stages as Commons bills. No bill can become law (become an Act) unless it has been passed in identical form by both Houses and has been assented to, in the Queen's name, by the Governor General or a deputy of the Governor General (usually a Supreme Court judge). Assent has never been refused to a federal bill, and our first Prime Minister declared roundly that refusal was obsolete and had become unconstitutional. In Britain, Royal Assent has never been refused since 1707.
(I found this on the Government's site under How Canadians Govern: page 4 and 5)
http://www.parl.gc.ca/information/library/idb/forsey/what_goes_on_04-e.asp