641—70.1 (135) Applicability. Prior to March 1, 2000, this chapter applied to all persons who were certified lead professionals in Iowa. Beginning March 1, 2000, this chapter applies to all persons who are lead professionals in Iowa. Beginning July 1, 2004, this chapter also applies to agencies that provide lead-safe work practices training programs in Iowa and to those who are registered lead-safe work practices contractors in Iowa. This chapter requires lead professionals to be certified and establishes specific requirements for how to perform lead-based paint activities if a property owner, manager, or occupant chooses to undertake them. However, nothing in this chapter requires a property owner, manager, or occupant to undertake any particular lead-based paint activity. This chapter also provides for the approval of lead-safe work practices courses and the voluntary registration of lead-safe work practices contractors.