42 Pa.C.S. § 6907
(a) General rule.— If any lessee who has signed a rental-purchase agreement experiences an interruption or reduction of 25% or more of income due to involuntary job loss, involuntary reduced employment, illness, pregnancy or disability after two-thirds or more of the total amount of the rental payments necessary to acquire ownership under the agreement has been paid, the lessor shall reduce the amount of each rental payment by: