The federal Residential Lead-Based Paint Hazard Reduction Act of 1992, also known as Title X, mandates that sellers and license holders disclose any known information concerning lead-based paint or lead-based paint hazards before the sale or lease of most housing built before 1978. This specific year was established because the U.S. Consumer Product Safety Commission banned the use of lead-based paint in residential properties in 1978. The law requires providing an EPA-approved pamphlet, disclosing known hazards, and offering buyers a 10-day period to conduct an inspection.

A. 1976: This year is incorrect. The federal law specifically uses 1978 as the cutoff date, coinciding with the year the paint was banned for consumer use.

C. 1974: This is an incorrect date. The legal requirement is tied directly to the 1978 federal ban on lead-based paint in housing.

D. 1972: This is an incorrect date. While the dangers of lead were known, the specific legal disclosure requirement applies to pre-1978 housing.

1. U.S. Environmental Protection Agency (EPA). The Lead Disclosure Rule. "The Lead Disclosure Rule requires that potential buyers and renters of housing built prior to 1978 receive certain information about lead and lead hazards in the residence prior to becoming obligated to buy or rent..." Retrieved from the official EPA website on lead regulations. (epa.gov/lead/lead-disclosure-rule)

2. Code of Federal Regulations. Title 24, Part 35, Subpart A - Disclosure of Known Lead-Based Paint and/or Lead-Based Paint Hazards Upon Sale or Lease of Residential Property. § 35.86, "This subpart applies to all transactions to sell or lease target housing... 'Target housing' means any housing constructed prior to 1978..."

3. Virginia Department of Professional and Occupational Regulation (DPOR). Virginia Real Estate Board Educational Requirements, Pre-licensing Curriculum (Salesperson). Section II: Property Law, Topic F: Federal and State Laws Affecting Real Estate, which covers the federal requirement for lead-based paint disclosure for properties built before 1978.

4. United States Code. Title 42, Chapter 63A, § 4852d - Disclosure of information concerning lead upon transfer of residential property. This statute outlines the disclosure requirements for target housing, which is defined as housing constructed before 1978.