PA SB801

Removes the 300-week time limit for filing workers' compensation claims for occupational diseases with latency periods exceeding 300 weeks between workplace exposure and disease manifestation

Requires claims for long-latency diseases to be filed within 3 years of diagnosis, with the claimant bearing the burden of proving the disease has a latency period exceeding 300 weeks

Shields insurers from liability for retroactive claims that were previously barred by the 300-week limitation, directing those claims instead to the Workers' Compensation Security Fund

Establishes the Workers' Compensation Act as the exclusive remedy for any injury or disease arising from hazardous occupational exposure, whether compensable or not

Applies retroactively to exposures that occurred before the effective date, allowing claims based on past hazardous occupational exposure to be filed after enactment