NY CPLR § 214-C (2021)
2021 New York Laws CVP - Civil Practice Law and Rules Article 2 - Limitations of Time 214-C - Certain Actions to Be Commenced Within Three Years of Discovery.

§  214-c.  Certain  actions  to  be  commenced  within  three years of discovery. 1. In this section:   "exposure"  means  direct  or  indirect exposure  by absorption, contact, ingestion, inhalation, implantation or injection.   2. Notwithstanding the provisions  of  section  214,  the  three  year period  within which an action to recover damages for personal injury or injury to property caused by the  latent  effects  of  exposure  to  any substance  or combination of substances, in any form, upon or within the body or upon or within property must be commenced shall be computed from the date of discovery of the injury by the plaintiff or  from  the  date when  through  the  exercise  of reasonable diligence such injury should have been discovered by the plaintiff, whichever is earlier.   3. For the purposes of sections fifty-e and  fifty-i  of  the  general municipal  law,  section  thirty-eight hundred thirteen of the education law and the provisions of any general, special or local law  or  charter requiring  as  a  condition  precedent  to  commencement of an action or special proceeding that a notice of claim be filed or presented within a specified period of time after the claim or action accrued, a  claim  or action  for  personal  injury or injury to property caused by the latent effects of exposure to any substance or combination  of  substances,  in any  form,  upon  or within the body or upon or within property shall be deemed to have accrued on the date of discovery of  the  injury  by  the plaintiff  or  on  the  date  when  through  the  exercise of reasonable diligence the injury should have been discovered, whichever is earlier.   4. Notwithstanding the provisions of subdivisions  two  and  three  of this  section, where the discovery of the cause of the injury is alleged to have occurred less than five years after discovery of the  injury  or when  with reasonable diligence such injury should have been discovered, whichever is earlier, an action may be commenced or a claim filed within one year of such  discovery  of  the  cause  of  the  injury;  provided, however, if any such action is commenced or claim filed after the period in which it would otherwise have been authorized pursuant to subdivision two or three of this section the plaintiff or claimant shall be required to  allege and prove that technical, scientific or medical knowledge and information sufficient to ascertain the cause of his injury had not been discovered, identified or determined prior  to  the  expiration  of  the period  within  which the action or claim would have been authorized and that he has otherwise satisfied the requirements of subdivisions two and three of this section.   5. This section shall not be applicable to any action for  medical  or dental malpractice.   6.  This  section  shall  be applicable to acts, omissions or failures occurring prior to, on or after July first, nineteen hundred eighty-six, except that this section shall not be applicable to any act, omission or failure:  (a) which occurred prior to July first, nineteen  hundred  eighty-six, and  (b)  which  caused  or  contributed  to  an  injury  that  either  was discovered or through the exercise of reasonable diligence  should  have been discovered prior to such date, and  (c)  an  action  for  which  was or would have been barred because the applicable period of limitation had expired prior to such date.