Dunno Roadog, seems pretty straight forward to me.
"Under the rule, beginning in April 2010, contractors performing renovation, repair and painting projects that disturb lead-based paint in homes, child care facilities, and schools built before 1978 must be certified and must follow specific work practices to prevent lead contamination."
Contractors who perform renovation, repairs, and painting jobs in pre-1978 housing and child-occupied facilities must, before beginning work, provide owners, tenants, and child-care facilities with a copy of EPA's lead hazard information pamphlet
Understand that after April 22, 2010, federal law will require you to be certified and to use lead-safe work practices. To become certified, renovation contractors must submit an application and fee payment to EPA.
The Rule was expanded in 2009 and eliminated the waiver exemption you quoted
October 21, 2009 -– EPA is proposing to expand coverage of its 2008 Renovation, Repair and Painting Rule as part of its ongoing commitment to eliminate lead poisoning. The proposed rule would eliminate an exemption from the RRP rule.
The federal government banned lead-based paint from housing in 1978. However, if a home was built before 1978, it has a higher likelihood of containing lead-based paint. The 2008 rule requires contractors working in pre-1978 housing where children under six or pregnant women reside to take the proper precautions to work lead-safe, including minimizing the dust, containing the work area, and conducting a thorough cleanup to reduce the potential exposure associated with disturbing lead-based paint. This rule would expand such requirements to cover most pre-1978 homes.