Of the endless styles of writing, from epic poetry to computer code to instructions on how to eat a Twinkie, Legislative Drafting occupies a distinct niche. When it is done well, it can change the nature of government. When done poorly, as it often is, things can be disastrous.
This reference page has material that may give some assistance on the legislative drafting styles used by the U.S. Congress. The definitive drafters in Congress are located in the House Office of the Legislative Counsel, though the Senate has a separate Legislative Counsel handling that Chamber’s drafting needs who are quite able as well.
How Our Laws Are Made: A Ghost Writer’s View by Sandra Strokoff, The Philadelphia Lawyer, Philadelphia Bar Association Quarterly Magazine, Vol. 59, No. 2, Summer 1996.