The Canadian Congressman titled the bill (as) the Clean Fuel Act

I would prefer the first sentence.

However, Canada does not have a Congress, and no one can be a member of Congress (if one means the United States) without having been a U. S. citizen for seven years. Canada has a House of Commons and a Senate. A Canadian, therefore, can be an MP (Member of Parliament) or a Senator, but not a Congressman.

in either case, the third "the" should be capitalized...

Just an example, ignore the part about Canadian.

In addition to capitalizing the third "the," should "titled" be "entitled" or does it work either way? Should the bill name be in quotations?

If you want help, it is good to be respectful of the people reading your questions, and also to take more care composing them .

I apologize if you took my comment the wrong way. I think you just misinterpreted my tone of voice. I didn't mean it in a negative way.