La. Stat. Ann. § R.S. 40:1285.4

§1285.4. Program for detection of lead poisoning sources; voluntary and compulsory inspections; posting dangerous areas; mandatory physical examinations
A.(1) The state health officer or his designee shall establish a comprehensive program for detection of sources of lead poisoning. Such program shall attempt, to the extent permitted by appropriations, to locate all dwellings in which the paint, plaster, or other accessible substance contains dangerous amounts of lead. The means of detection and the amount of lead that produces the danger of lead poisoning shall be determined by regulation by the state health officer in accordance with current technical knowledge and guidelines of the United States Centers for Disease Control and Prevention, United States Environmental Protection Agency, and United States Department of Housing and Urban Development.
(2) Such programs of detection shall, to the extent that all appropriate dwellings are not inspected, give priority in inspections to those dwellings located in areas where significant numbers of lead poisoning cases have recently been reported, and in which children under the age of six years or other persons deemed at risk by the state health officer or his designee reside.
B. When the state health officer or his designee is informed of a case of lead poisoning pursuant to this Part, or otherwise, he shall cause to have inspected the dwelling in which the person with lead poisoning resides, or has recently resided, if the occupants of said dwelling consent, after reasonable notice, to such inspection. The findings of such inspection shall be reported to the state health officer or his designee and to the appropriate enforcement authorities provided in R.S. 40:1285.9.
C. A dangerous level of lead found in a dwelling inspected pursuant to this Section, or otherwise, shall be reported immediately to the owner of the building or to his duly appointed representative, all affected tenants, the appropriate enforcement authorities set out in R.S. 40:1285.9, and the state health officer or his designee. The state health officer or his designee shall inform such other persons or agencies as he deems advisable, and shall cause to have prominently posted on the main entrance to said dwelling a notice that the dwelling contains dangerous amounts of lead paint or other lead materials and that children under the age of six years and persons deemed at risk should not be allowed to reside in said dwelling. Such notice may not be removed until all premises have been found to comply with R.S. 40:1285.7. Unauthorized intentional removal of the notice shall subject the offender to a fine of five hundred dollars.
D. When a dangerous level of lead is found in a dwelling inspected pursuant to this Part, or otherwise, the state health officer or his designee shall cause to have examined all children under the age of six years and other persons as he may find advisable to examine, residing or who have recently resided in said dwelling. The results of such examinations shall be reported to the state health officer or his designee, the affected individual, and his parent or legal guardian. The state health officer or his designee shall inform such other persons or agencies as he deems advisable.