24 C.F.R. § 35.90 Opportunity to conduct an evaluation.
Title 24 - Housing and Urban Development
(a) Before a purchaser is obligated under any contract to purchase target housing, the seller shall permit the purchaser a 10-day period (unless the parties mutually agree, in writing, upon a different period of time) to conduct a risk assessment or inspection for the presence of lead-based paint and/or lead-based paint hazards. (b) Notwithstanding paragraph (a) of this section, a purchaser may waive the opportunity to conduct the risk assessment or inspection by so indicating in writing. [61 FR 9082, Mar. 6, 1996, as amended at 64 FR 14382, Mar. 25, 1999]
Title 24: Housing and Urban Development
PART 35—LEAD-BASED PAINT POISONING PREVENTION IN CERTAIN RESIDENTIAL STRUCTURES
Subpart A—Disclosure of Known Lead-Based Paint and/or Lead-Based Paint Hazards Upon Sale or Lease of Residential Property
§ 35.90 Opportunity to conduct an evaluation.

