What is the name of the regulation that mandates lead paint disclosure?

The correct answer is the regulation that pertains to lead paint disclosure, known as the Lead-Based Paint Hazard Reduction Act, which is often associated with the requirements set forth under the Residential Lead-Based Paint Hazard Disclosure Rule. This rule mandates that sellers and landlords disclose any known information on lead-based paint and lead-based paint hazards before selling or leasing properties built before 1978.

While the other options are regulatory designations that deal with various aspects of finance or other sectors, they do not pertain to lead paint disclosure. For instance, Regulation Z primarily addresses the Truth in Lending Act, offering protections against unfair lending practices. Regulation Y governs bank holding companies, and Regulation W relates to transactions between banks and their affiliates. None of these regulations concern the specifics of lead paint disclosures, which is why the correct answer is associated with the proper regulation aimed at protecting tenants and buyers from potential lead hazards in older properties.