A possible interpretation.

Contingent and prospective liabilities refer to liability of a company that arise when an event takes place ( e . g ., defined as a contingency under a surety contract ) or liabilities that may arise in future ( e . g ., probable claims by tort victims ).
https://eng.ichacha.net/zaoju/prospective liabilities.html

What Is a Contingent Liability?
A contingent liability is a liability that may occur depending on the outcome of an uncertain future event. A contingent liability is recorded if the contingency is likely and the amount of the liability can be reasonably estimated. The liability may be disclosed in a footnote on the financial statements unless both conditions are not met.
https://www.investopedia.com/terms/c/contingentliability.asp

Contingent liabilities are liabilities that may be incurred by an entity depending on the outcome of an uncertain future event[1] such as the outcome of a pending lawsuit. These liabilities are not recorded in a company's accounts and shown in the balance sheet when both probable and reasonably estimable as 'contingency' or 'worst case' financial outcome. A footnote to the balance sheet may describe the nature and extent of the contingent liabilities. The likelihood of loss is described as probable, reasonably possible, or remote. The ability to estimate a loss is described as known, reasonably estimable, or not reasonably estimable. It may or may not occur.

https://en.wikipedia.org/wiki/Contingent_liability

Claims, the term for fulfillment of obligations in respect of which has not yet become due.

Ref: Fulfillment of an obligation
(https://www.researchgate.net/publication/313837393)

the term within which the obligation should be fulfilled
(https://eujournal.org › esj › article ›)