(b) Where a police officer or firefighter subject to section thirty of this article, or emergency medical technician, paramedic, or other person certified to provide medical care in emergencies, or emergency dispatcher files a claim for mental injury premised upon extraordinary work-related stress incurred in a work-related emergency, the board may not disallow the claim, upon a factual finding that the stress was not greater than that which usually occurs in the normal work environment. 4. Any person incarcerated upon conviction of a felony shall be deemed ineligible for all benefits provided under this chapter. All those whose benefits have ceased by operation of this section, may apply to the board for benefits upon their release from custody pursuant to regulation of the board.