Until about 2000, the BCA had a Rules Committee. The members were selected by the BCA partly based on interest and experience but I'm not sure of the details. About 2000, the BCA decided that the Rules Committee was no longer necessary and got rid of it.
Somewhere around 1995 the WPA instituted a policy on a rules revision cycle such that no significant changes to the rules would happen for the five years after each revision.
The last major revision of the World Standardized Rules went into effect in January 2008. Prior to that the WPA contacted me to edit and propose a complete revision and rationalization of the rules. Over the years (between about 1980 and 2006) the rules had changed by being mended and patched and amended and repeated so that the document as it was needed a complete rewrite. I did that rewrite and posted my revision on-line so that anyone in the world who wanted to comment on them could easily do so. That revision is still available at
http://www.sfbilliards.com/Rev1.html
Many people sent in comments which are listed along with the revision. I tried to take all the comments into account, but it was always necessary to keep the result as concise, clear, unambiguous, and consistent as possible.
In October of 2006 a working committee of 13 people from around the world met in Gary, Indiana for three days to discuss and modify my proposed revision and come up with a new set of rules to propose to the federations and confederations of the WPA. The committee was chosen by the confederations. Unlike some committees I've been on, I found the discussions and work of the committee to be very productive.
Here is the news item about the committee on the WPA web site. For the WPA, the effort was headed by Thomas Overbeck.
The draft was sent to the federations and some comments came back which Thomas and I worked on to fold into the final draft keeping the discussions in Gary in mind. That final draft was voted on and accepted by the members of the WPA at a General Assembly which I believe was at the end of November in 2007. The new rules became effective on January 1st 2008.
Anyone who is interested in working on a revision of the rules should first contact their national federation to see how they can help. In the US, that would be the BCA. If anyone is interested in working on the rules, they will first need to understand the present rules, regulations and equipment specifications. Those are on the WPA website:
http://www.wpa-pool.com/web/home