(a) Lead-based paint activities, as defined in §295.202 of this title (relating to Definitions) shall only be conducted according to the procedures and standards contained in §295.212 of this title (relating to Standards for Conducting Lead-Based Paint Activities). However, the standards contained in §295.212 of this title do not apply when treating paint-lead hazards less than:(1) two square feet of deteriorated lead-based paint per room or equivalent;(2) 20 square feet of deteriorated paint on the exterior building; or(3) 10% of the total surface area of deteriorated paint on an interior or exterior type of component with a small surface area.(b) No persons may offer to perform or perform any lead-based paint activity in target housing or in a child-occupied facility, unless certified to perform that activity according to the procedures in §§295.205 - 295.211 of this title (relating to Texas Environmental Lead Reduction).(c) All firms performing lead-based paint activities shall employ only appropriately certified individuals to conduct those lead-based paint activities.(d) All persons engaged in lead-based paint activities must have the department-issued certification ID card and one form of photo identification present at the worksite.