"You are giving out the required lead pamphlet when you cut into walls for boxes and such in pre 1978 homes, aren't you? "
This was the question posed to me some time back, and my honest answer was something like, "What are you talking about?". Aparently, you are supposed to give out the EPA pahmplet "Protect you and your family from lead in your home" each time you do work in a pre-1978 home. There is a "receipt" that the person is supposed to sign that they received the pamphlet. Sorta like the doctors and dentists all do now with that health information privacy act "HIPA" stuff. Both that booklet and the receipt are downloadable from the EPA website, or you can order them from them.
Here's the whole run-down for contractors, straight from the EPA, on the pre-rennovation homeowner education rules.
http://www.epa.gov/lead/pubs/interiorfinal2.pdf
This is an excellent PDF on the matter. If your work will disturb less than two square feet of painted surfaces in total, you don't need to worry about it. It doesn't take too many cut in boxes and access holes to get up to two square feet.